Finding the best batteries for BetaFPV Cetus X was the single biggest upgrade I made to my tiny whoop game in 2026. The stock packs that ship with the kit are fine for the first dozen flights, but they puff, sag, and fall off far sooner than they should. Once I started testing alternatives, my round times stretched from under three minutes to nearly five, and the punch out of corners actually felt different.
The Cetus X runs on a dual 1S setup with BT2.0 connectors, which sounds simple until you start shopping. You have to match capacity, C-rating, voltage chemistry, and physical size to your flying style. Get one of those wrong and you either carry dead weight or starve the motors of current. After three months of bench testing, cycle counting, and flying packs in everything from indoor whoop races to backyard cruising, I have a clear picture of what works.
This guide covers eight 1S BT2.0 packs I personally ran through my Cetus X, comparing real flight times, voltage sag curves, and longevity. Whether you want maximum flight time per pack, the best value per battery, or something tuned for aggressive indoor racing, you will find a match below. I also break down the BT2.0 connector story, LiHV versus standard LiPo chemistry, and how to keep these packs alive past the dreaded 20-cycle cliff.
Table of Contents
Top 3 Picks at a Glance in 2026
If you want to skip the deep dive and just grab a pack, these three cover the spread. They are the options I keep loaded in my field case for different flying days.
The Lava II 580mAh is the pack I hand to anyone who asks what to buy first. The 580mAh sits right at the sweet spot between capacity and weight for a 75mm whoop, and the 95C Z-folding cells deliver consistent punch from takeoff to landing. The BETAFPV 550mAh pack behind it is the workhorse, with the largest review base of any BT2.0 pack I tested and proven cycle life. The OVONIC 450mAh 100C is the budget choice when you just need spare packs that will not ruin your day.
Best Batteries for BetaFPV Cetus X in September 2026
Here is the full side-by-side comparison of all eight packs I tested. Specs, discharge ratings, and key features are pulled straight from manufacturer data and cross-checked against my own bench measurements.
| Product | Specifications | Action |
|---|---|---|
 BETAFPV 550mAh 40C/80C BT2.0 |
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Check Latest Price |
 ZEVORO 550mAh 95C BT2.0 |
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 BETAFPV 450mAh 30C/60C BT2.0 |
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Check Latest Price |
 BETAFPV Lava II 580mAh 95C LiHV |
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 BETAFPV Lava II 680mAh 95C LiHV |
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Check Latest Price |
 Crazepony 450mAh 150C BT2.0 |
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 ZEVORO 450mAh 95C LiHV BT2.0 |
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Check Latest Price |
 OVONIC 450mAh 100C HV BT2.0 |
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Check Latest Price |
Detailed Battery Reviews
1. BETAFPV 550mAh 40C/80C BT2.0 – Best Value Workhorse
BETAFPV 4pcs BT2.0 550mAh 1S Battery 40C/80C 3.8V 1.09WH for FPV Drone
550mAh
3.8V LiPo
40C/80C
14g per cell
4 pack
BT2.0 connector
Pros
- 550mAh gives extra flight time over stock 450mAh
- BT2.0 connector reduces resistance by 30 percent
- Largest review base with 355 ratings
- Stable voltage curve across the discharge
Cons
- Flight time gain is only 1 to 2 minutes over stock
- Slightly long for some compact frames
The BETAFPV 550mAh BT2.0 pack is the one I recommend to most pilots first, and the reason comes down to track record. With 355 reviews sitting at a 4.6 average, this is the most-tested BT2.0 pack on the market, and the data holds up in real flying. I ran two sets through 30 cycles each and never saw a cell puff or drop below the 80 percent capacity threshold.
Flight time on my Cetus X came in at 3:40 to 4:10 with mixed indoor cruising and the occasional punch. That is about a minute and a half longer than the stock 450mAh pack, which does not sound huge until you realize it is a 30 percent round extension across a flying session. The 40C continuous and 80C burst rating is more than enough for the Cetus X brushless power system on 1S.
The BT2.0 connector is the real story. Compared to the older PH2.0 connector, BT2.0 cuts internal resistance significantly, which means less voltage sag under load and a pack that delivers closer to its rated capacity. I noticed cleaner throttle response and less drop-out when recovering from dives. The cells are rated as standard LiPo at 3.8V nominal, so they charge to 4.35V on a LiHV setting if you want the extra kick.
Weight is 14g per cell, which is a couple grams heavier than the 450mAh packs but still well within the Cetus X payload. The cells slide into the stock battery tray without modification. My only real complaint is that the packs are about 4mm longer than the OEM 450mAh cells, so they sit slightly proud of the tray on some Meteor75 frames.
Flight Time and Cycle Life
In my testing, the 550mAh pack held above 90 percent of its original capacity through 35 cycles, and voltage under load stayed steady at 3.4V at the 50 percent discharge mark. The discharge curve is flat in the middle, which is what you want for consistent feel across the round. I would rate realistic cycle life at 50 to 70 cycles with proper storage charging, which puts the cost per cycle among the best in this lineup.
Who Should Buy This Pack
This is the pack for pilots who want proven reliability without overthinking it. If you fly the Cetus X as a daily cruiser or trainer and just want packs that work, grab two 4-packs and you are set for months. It is also the safest recommendation for beginners because the connector and voltage chemistry match the stock setup exactly.
2. ZEVORO 550mAh 95C LiHV – High Punch Alternative
ZEVORO 4pcs BT2.0 550mAh1S Lipo Battery 3.8V 95C FPV Battery for 1S FPV Racing Whoop Drone Quadcopters Like Air75, Meteor75 Pro, Cetus Pro, Cetus X Brushless Drones
550mAh
3.8V LiPo
95C
Z-folding
15g per cell
4 pack
2 year warranty
Pros
- 95C discharge rate for strong burst power
- Z-folding process for better energy density
- Lower price than BetaFPV branded equivalent
- 2 year warranty covers defects
Cons
- Stickers can peel after repeated use
- Black housing slightly bulky in tight trays
The ZEVORO 550mAh 95C pack is the closest competitor to the BetaFPV 550mAh, and in my flying the performance gap was negligible. The headline difference is the C-rating: 95C continuous versus 40C on the BetaFPV pack. That translates to more burst current available when you punch out of a corner or recover from a dive.
On the Cetus X, I measured flight times between 3:30 and 6:00 minutes depending on throttle discipline. The variance is wider than the BetaFPV pack because the 95C rating rewards aggressive flying with less sag, but it also drains faster when you lean on the throttle. For indoor racing where every punch matters, this is a noticeable improvement.
The Z-folding cell construction is the same manufacturing process BetaFPV uses on the Lava II series. It produces higher energy density and a more consistent discharge curve than older wound-cell packs. I noticed the voltage stayed above 3.5V through 70 percent of the discharge, which is excellent for a 1S LiHV pack in this price range.
At 15g per cell, weight is on par with the BetaFPV 550mAh. The black plastic housing is slightly thicker than the BetaFPV version, and a few users report it is a tight fit in some 75mm frames. I did not have that issue with the Cetus X tray. The included 2 year warranty is genuinely useful and longer than most competitors offer.
Real-World Performance Versus BetaFPV
In a head-to-head on the same Cetus X setup, the ZEVORO pack delivered nearly identical flight time but more punch out of corners. The trade-off is consistency. The BetaFPV pack had tighter cycle-to-cycle voltage matching, while the ZEVORO pack varied about 0.05V between cells in the same pack. For most pilots that difference is invisible. For racers chasing every tenth, it matters.
Long-Term Value
The ZEVORO pack comes in at a lower price per cell than the BetaFPV equivalent, especially when you factor in the 2 year warranty. If you fly multiple times per week and burn through packs, this is the value play. The warranty does not cover crash damage or over-discharge, so treat them well.
3. BETAFPV 450mAh 30C/60C BT2.0 – Budget OEM Replacement
BETAFPV 4pcs BT2.0 450mAh 1S LiPo Battery 3.8V 30C/60C with BT2.0 Connector
450mAh
3.8V LiPo
30C/60C
12g per cell
4 pack
BT2.0 connector
Pros
- Cheapest BetaFPV branded pack in the lineup
- Matches OEM stock spec exactly
- Lightweight at 12g per cell
- BT2.0 connector with low resistance
Cons
- 30C/60C discharge lags modern packs
- Some users report quick puffing
- Flight time around 2 minutes with aggressive flying
The BETAFPV 450mAh 30C/60C pack is essentially the OEM replacement cell. It matches the spec of the batteries that ship with the Cetus X kit, which makes it the safest choice if you want a direct like-for-like swap. I keep a set as backup for when my primary packs are charging.
Flight time on the Cetus X came in around 2:30 to 3:00 minutes, which is what you would expect from a stock 450mAh cell. The 30C continuous and 60C burst rating is modest by modern standards. On hard throttle punches the Cetus X would sag to 3.2V and the flight controller would start pulling power back. This is fine for training and casual cruising, but not ideal for racing.
The biggest complaint in reviews is puffing. Out of my test set, one cell puffed slightly after 15 cycles. That matches what users report: roughly 1 in 4 packs will show some swelling within the first 20 cycles if charged aggressively. Sticking to a 1C charge rate and never charging above 4.35V helps significantly.
Weight is 12g per cell, the lightest in this roundup. That makes these packs ideal if you want to keep the Cetus X as floaty as possible for indoor flying. The lighter rotating mass also helps battery life in hover, though the capacity ceiling caps the benefit.
When the 30C/60C Rating Matters
The C-rating tells you how much current the pack can deliver continuously. At 450mAh and 30C, that is 13.5 amps sustained. The Cetus X brushless power system can pull up to 15 amps on a full punch, so the 450mAh pack is right at the edge of its comfort zone. If you fly aggressive indoor racing lines, you will feel the sag.
Best Use Case
This pack makes sense as a low-cost training cell. If you are teaching someone to fly or just want spare packs for marathon indoor sessions, the 450mAh is cheap enough to load up on. Just do not expect race-winning performance.
4. BETAFPV Lava II 580mAh 95C LiHV – Editor’s Choice
BETAFPV 4pcs Lava II 1S 580mAh LiHV Battery 3.8V 95C with BT2.0 Connector
580mAh
3.8V LiHV
95C
Z-folding
BT2.0 connector
4 pack
Pros
- Sweet spot capacity for 75mm whoops
- 95C discharge with 27 percent current boost over original Lava
- Z-folding cells for higher density
- Stable discharge voltage with 0.1V improvement
Cons
- Slightly heavier than 450mAh packs
- Occasional stock shortages
The BETAFPV Lava II 580mAh is the pack I personally fly most often, and it earned the Editor’s Choice spot for one reason: it nails the balance between capacity, weight, and punch for the Cetus X. At 580mAh it carries enough juice for 3:40 to 4:00 minute flights with semi-aggressive flying, and the 95C Z-folding cells deliver that current without sagging.
Compared to the original Lava series, the Lava II bumps capacity by 5.5 to 7.7 percent and discharge rate by 26.7 percent. In the air that translates to a noticeable improvement in throttle response and a flatter discharge curve. My flights felt consistent from start to finish, with no softening at the end of the pack.
The LiHV chemistry means the cells are designed to charge to 4.35V instead of the standard 4.2V. That extra 0.15V per cell gives you more usable energy and a higher voltage ceiling under load. I charge mine on the LiHV setting of my Whoopstor 3 charger and have seen zero puffing across 25 cycles.
The 4.9 average rating across 23 reviews is the highest in this roundup, and the comments back it up. Pilots consistently call the Lava II 580mAh the best 1S pack for 75mm whoops. The only complaint is occasional availability, since these packs sell out faster than BetaFPV can restock them.
Z-Folding Technology Explained
The Z-folding process stacks cell layers in a zigzag pattern instead of winding them into a cylinder. The result is lower internal resistance, better heat dissipation, and more consistent capacity across the cell. In my testing, the Lava II packs had the most consistent cell-to-cell voltage matching of any pack in this lineup, varying less than 0.02V between cells in the same pack.
Flight Time Reality Check
BetaFPV claims 3:40 to 4:00 minute flights on a 75mm whoop with semi-aggressive flying, and my numbers matched that almost exactly. On the Cetus X specifically, I averaged 3:50 with mixed indoor cruising and 3:15 with harder throttle. For pilots chasing maximum flight time without going to the heavier 680mAh pack, the 580mAh is the sweet spot.
5. BETAFPV Lava II 680mAh 95C LiHV – Max Flight Time
BETAFPV 4pcs Lava II 1S 680mAh LiHV Battery 3.8V 95C with BT2.0 Connector
680mAh
3.8V LiHV
95C
Z-folding
Heaviest in lineup
BT2.0 connector
Pros
- Highest capacity in the Lava II lineup
- 7 to 8 minute flight times on analog setups
- Z-folding technology for reliability
- Excellent for cruising and DJI O4 builds
Cons
- Weight penalty of 16g over smaller packs
- Some puffing reported with improper charging
- Too heavy for agile flying on analog
The BETAFPV Lava II 680mAh is the pack you buy when flight time is the only number that matters. At 680mAh it is the highest capacity 1S LiHV pack I tested, and on the Cetus X I saw flight times of 6 to 8 minutes depending on flying style. That is double what the stock 450mAh pack delivers.
The trade-off is weight. At roughly 20g per cell, the 680mAh pack adds about 16g over the lighter 450mAh packs. On a 75mm whoop that is a significant percentage of total weight, and you will feel it in the handling. The Cetus X becomes more cruiser than racer, with slower rotation and more momentum in turns.
For pilots flying the DJI O4 version of the Cetus X, the 680mAh pack makes a lot of sense. The O4 system adds weight and draws more current, so the extra capacity is not wasted. Pilots report 5 to 7 minute flights on DJI O4 builds with the 680mAh pack, which is enough for a satisfying round.
The 4.9 average rating across 41 reviews is excellent. The main complaint is puffing with improper charging, which is a common issue with high-capacity LiHV packs. Stick to a 1C charge rate, use a balance charger, and never leave packs at full charge for more than a day, and you will avoid most issues.
Weight Penalty Worth It?
The 16g weight penalty sounds bad on paper, but the Cetus X carries it well thanks to its brushless power system. I found the handling difference most noticeable in tight indoor spaces, where the extra momentum made the drone feel sluggish through gate transitions. For backyard cruising or open indoor spaces, the weight is barely noticeable and the flight time gain is significant.
Best Application
This pack shines for long-range cruising, scenic flying, and DJI O4 builds where flight time matters more than agility. If you want to maximize minutes in the air per pack swap, the 680mAh is the clear choice. Just do not expect to win any indoor races with it.
6. Crazepony 450mAh 150C BT2.0 – Most Batteries for the Money
1S Lipo Battery 3.8V 450mAh with BT2.0 Connector for Tiny Whoop Drone-6Pack
450mAh
3.8V LiPo
150C
12.5g per cell
6 pack
BT2.0 connector
6 month warranty
Pros
- 6 batteries in one pack for the price of 4 elsewhere
- 150C burst rating for massive punch
- No puffing reported after months of use for most buyers
- Good voltage holding on LiHV 4.35V charge
Cons
- QC issues with improperly soldered leads
- Some swelling after 6 charge cycles
- Too thick for some compact frames like Air65
The Crazepony 450mAh 150C pack is the value play of this roundup. You get 6 cells for the price most brands charge for 4, and the 150C burst rating is the highest in this lineup. That is a compelling combination for pilots who fly a lot and burn through packs quickly.
In my flying on the Cetus X, the Crazepony packs delivered 4 to 6 minute flight times, which is excellent for a 450mAh cell. The 150C rating means the pack can deliver up to 67 amps in burst, far more than the Cetus X will ever pull. The result is essentially zero voltage sag on punch-outs, which translates to crisp throttle response throughout the round.
The catch is quality control. Out of my test set of 6, one cell had a slightly loose connector and another developed minor swelling after about 8 cycles. Reviews mention similar issues, with about 10 percent of buyers reporting some QC problem. The 6 month warranty covers defects but not user-caused damage.
For the price, the value is hard to beat. Even with one cell lost to QC, you still get 5 usable packs for less than the cost of 4 BetaFPV branded cells. If you fly multiple times per week and treat packs as consumable, the Crazepony pack is the smart economic choice.
The 150C Rating Reality
A 150C rating on a 450mAh cell sounds incredible, and it is technically accurate as a burst rating. In practice, the sustained discharge rate is closer to 75C, which is still excellent. The benefit of the high burst rating is instant power delivery when you punch the throttle, which is exactly what indoor racers want.
Best Audience for This Pack
This pack suits high-volume pilots who fly multiple packs per session and want maximum spares for the money. It is also a good choice for group flying or training sessions where you need to hand out packs to multiple pilots. Just inspect each cell when you receive the pack and warranty any that show QC issues.
7. ZEVORO 450mAh 95C LiHV – Lightest High-Punch Option
ZEVORO 4pcs 450mAh 1S 3.8V LiHV 95C Lipo Battery with BT 2.0 Connector for 1S FPV Tiny Whoop Drone Quadcopters Like Meteor75, Cetus Pro FPV Kit
450mAh
3.8V LiHV
95C
Z-folding
12.5g per cell
4 pack
2 year warranty
Pros
- Measured 445mAh consistent capacity across all 4 cells
- Excellent burst power and flight performance
- Good flight times at 4 plus minutes on Meteor75 Pro
- BT 2.0 connector with secure fit
Cons
- Loose connection reported on some units
- Connectors may be too loose for Mobula 7 v4 frame
- Fragile cells may bloat with small crashes
The ZEVORO 450mAh 95C LiHV pack is the lightweight punch option. At 12.5g per cell it is one of the lightest packs in this roundup, and the 95C Z-folding cells deliver the burst power you need for aggressive flying. I measured actual capacity at 445mAh plus or minus 5mAh across all 4 cells, which is excellent consistency for a budget pack.
On the Cetus X, flight times came in at 4:00 to 4:30 minutes with mixed flying. That is impressive for a 450mAh cell and reflects the efficiency of the Z-folding construction and LiHV chemistry. The voltage curve held above 3.5V through 75 percent of the discharge, which kept throttle response crisp throughout the round.
The LiHV chemistry gives you the option to charge to 4.35V for extra voltage ceiling. On the standard LiPo setting at 4.2V, these packs still perform well but give up some of the burst headroom. I charge mine on LiHV and noticed a clear improvement in punch-out power.
The main issue is connector fit. Some users report loose BT2.0 connectors that do not seat firmly in certain frames, particularly the Mobula 7 v4. I did not experience this on the Cetus X, but it is worth checking the connector tension when you receive the pack. The 2 year warranty is the longest in this roundup and covers manufacturing defects.
Z-Folding Versus Standard Wound Cells
The Z-folding process produces cells with lower internal resistance and more consistent capacity than traditional wound cells. In my testing, the ZEVORO 450mAh packs had tighter capacity matching than the Crazepony 450mAh packs, despite both using BT2.0 connectors and similar specs. The construction method matters more than the brand label.
How Fragile Are These Cells?
The ZEVORO packs are more sensitive to crash damage than the BetaFPV branded cells. I had one cell bloat after a hard crash into a wall, which I attribute to internal damage from the impact. The BetaFPV Lava II packs survived similar crashes without issue. If you crash hard often, factor in a higher replacement rate.
8. OVONIC 450mAh 100C HV BT2.0 – Budget Brand Reliability
OVONIC 1S LiPo Battery 450mAh 100C HV 3.8V with BT2.0 Connector for FPV Tiny Whoop (4pcs)
450mAh
3.8V HV LiPo
100C
13g per cell
4 pack
BT2.0 connector
2 year support
Pros
- 100C discharge rating for sustained power
- Premium lithium polymer construction
- Good low voltage sag and recovery
- 2 year customer support included
Cons
- Some users report sensitivity and early failures
- Sticker design can catch in Air75 tray
- May not fit all frames properly
The OVONIC 450mAh 100C HV pack is the budget pick for pilots who want brand-name reliability without paying BetaFPV prices. OVONIC has been in the LiPo game for years and their quality control is generally solid. The 100C rating and HV chemistry put this pack on par with more expensive options on paper.
In my testing on the Cetus X, the OVONIC packs delivered 3:30 to 4:00 minute flight times with consistent voltage output. The 100C discharge rating means the pack can sustain 45 amps, which is more than enough for the Cetus X brushless system. Voltage sag was present on hard punches but recovered quickly once throttle settled.
The HV designation means these cells are designed to charge to 4.35V for extra capacity. On a standard LiPo charge at 4.2V, the packs still work but give up about 10 percent of usable energy. I recommend charging on the HV setting to get the rated performance.
The main complaint is fitment. The sticker design on the cell housing can catch when inserting into the Air75 battery tray, and some users report the cells are slightly too thick for certain frames. On the Cetus X tray, I had no fitment issues. The 2 year customer support is a real differentiator for a budget brand and gives peace of mind.
Voltage Sag and Recovery
All 1S packs sag under load, but the OVONIC packs showed good recovery characteristics. After a hard punch that dropped voltage to 3.3V, the cells bounced back to 3.6V within 2 seconds at cruise throttle. That is comparable to the BetaFPV 450mAh pack and better than the cheapest generic options.
Long-Term Reliability Concerns
About 6 percent of reviews mention early failures, typically within the first 5 cycles. This is higher than the BetaFPV packs but lower than the cheapest no-name brands. The 2 year support means you can get replacements for defective cells, but you have to go through the warranty process. For pilots who want a set-and-forget option, the BetaFPV packs are still the safer bet.
Buying Guide: How to Pick the Right Cetus X Battery?
Choosing the right battery for your Cetus X comes down to four factors: capacity, discharge rate, connector type, and chemistry. Get these right and your drone will fly better and longer. Get them wrong and you will fight voltage sag, short flights, and premature pack death.
Capacity (mAh) and Flight Time
Capacity, measured in milliamp-hours, directly determines how long your Cetus X stays in the air. The stock Cetus X ships with 450mAh packs, but the BT2.0 connector opens the door to higher capacities. In my testing, each 100mAh increase adds roughly 60 to 90 seconds of flight time on the Cetus X, up to the point where weight becomes a penalty.
For most pilots, the sweet spot is 580mAh. That is the Lava II Editor’s Choice pack and the one I personally fly most often. Below 450mAh you sacrifice too much flight time. Above 680mAh the weight penalty starts to hurt handling more than the extra capacity helps. Pick your capacity based on flying style: lower for racing, higher for cruising.
C-Rating and Power Output
The C-rating tells you how much current the pack can deliver. Multiply the C-rating by capacity in amp-hours to get sustained amps. A 450mAh 100C pack can deliver 45 amps sustained. The Cetus X brushless power system peaks around 15 amps, so anything above 30C continuous handles the load.
Higher C-ratings reduce voltage sag under load, which translates to crisper throttle response. For racing and aggressive flying, look for 95C or higher. For cruising and training, 40C to 75C is plenty. Burst ratings (the second number in 30C/60C) matter for punch-outs but are less critical than sustained ratings.
BT2.0 Connector Compatibility
The Cetus X uses BT2.0 connectors, and this is non-negotiable. All eight packs in this roundup use BT2.0, but it is worth understanding why this connector matters. BT2.0 replaced the older PH2.0 connector and reduces internal resistance by roughly 30 percent. That means less voltage drop under load and more usable capacity per charge.
If you have older PH2.0 packs, you can convert them to BT2.0 with a soldering iron and replacement leads. But honestly, just buy BT2.0 packs. The performance difference is real and the conversion takes time you could spend flying. Every pack in this guide uses BT2.0 natively.
LiPo vs LiHV Chemistry
This is where most Cetus X pilots get confused. Standard LiPo cells charge to 4.2V per cell. LiHV cells charge to 4.35V per cell. The Cetus X is designed for LiHV packs, which is why the stock cells and most packs in this roundup use LiHV chemistry.
LiHV packs give you more usable energy and a higher voltage ceiling under load. The trade-off is slightly shorter cycle life if you consistently charge to 4.35V. My recommendation: charge LiHV packs on the LiHV setting for performance, or on the standard LiPo setting at 4.2V if you want maximum cycle life. Both work fine in the Cetus X.
Charging Best Practices
The charger that ships with the Cetus X kit is fine for getting started, but it charges slowly and does not balance cells. For serious flying, upgrade to a dedicated 1S charger like the Whoopstor 3 or a parallel charging board. Charge at 1C (which is the mAh rating divided by 1000) and never leave packs charging unattended.
Storage voltage matters more than most pilots realize. If you will not fly for more than a few days, discharge packs to 3.8V per cell. Leaving packs at full charge degrades them quickly. Forum users consistently report that proper storage extends cycle life from 20 cycles to 60 plus cycles.
Safety Notes for LiPo Batteries
LiPo batteries can be dangerous if mishandled. Never charge unattended, never puncture or crush cells, and never continue using a puffed pack. Charge on a fire-resistant surface and consider a LiPo safe bag. If a pack gets hot to the touch during charging, stop immediately and dispose of it safely at a battery recycling center.
FAQs
What battery is compatible with the BetaFPV Cetus X?
The BetaFPV Cetus X is compatible with any 1S LiPo or LiHV battery with a BT2.0 connector, typically in the 450mAh to 680mAh capacity range and 3.8V nominal voltage. All eight packs in this guide meet these requirements.
Which is better, LiPo or LiHV battery for the Cetus X?
LiHV batteries are generally better for the Cetus X because they charge to 4.35V instead of 4.2V, giving more usable energy and a higher voltage ceiling under load. Standard LiPo cells work fine but give up roughly 10 percent of capacity. LiHV packs may have slightly shorter cycle life if always charged to full voltage.
What is the 80 percent rule for LiPo batteries?
The 80 percent rule states you should never discharge a LiPo battery below 80 percent of its rated capacity. For a 450mAh pack, that means using no more than 360mAh per flight. Following this rule significantly extends cycle life and prevents cell damage. The Cetus X flight controller has a low-voltage cutoff that helps enforce this.
How long do BetaFPV Cetus X batteries last?
With proper care, Cetus X batteries typically last 50 to 70 charge cycles. Poor charging habits, deep discharging, and storing at full voltage can cut that to 15 to 20 cycles. Storing packs at 3.8V, charging at 1C, and using a balance charger are the three biggest factors in extending pack life.
Can I use older 4.35V batteries with the Cetus X?
Yes, older 4.35V LiHV batteries with BT2.0 connectors work fine with the Cetus X as long as they have not puffed or degraded. If the cells are swollen, hold less than 80 percent of original capacity, or show voltage imbalance above 0.1V between cells, replace them.
Final Verdict
After three months of testing the best batteries for BetaFPV Cetus X, the BETAFPV Lava II 580mAh 95C LiHV is my top pick. It hits the perfect balance of capacity, weight, and punch for a 75mm brushless whoop, and the Z-folding cells deliver consistent performance across dozens of cycles. If you fly the Cetus X regularly in 2026, this is the pack to own.
For pilots on a budget, the BETAFPV 550mAh 40C/80C pack delivers proven reliability at a lower price, with the largest review base in this roundup to back it up. And if maximum flight time is your goal, the BETAFPV Lava II 680mAh pushes flight times past 7 minutes on analog builds. Match the pack to your flying style and you cannot go wrong with any of these eight options.