Choosing the proper LiPo battery could make or break your FPV expertise, particularly in the case of efficiency. On this evaluation we examined the most recent GNB 6S LiHV and LiPo batteries to see how they stack up towards one another, and different well-liked manufacturers. With guarantees of greater vitality density and energy supply, these high-voltage (LiHV) packs carry lots to the desk—however do they ship? Let’s discover out. Moreover, there’s usually confusion about LiHV batteries and the ever-inflated C-ratings. On this evaluation, I’ll share insights and findings primarily based on real-world testing.
New to FPV? Take a look at our battery purchaser’s information to study the fundamentals: https://oscarliang.com/lipo-battery-guide/
Overview of the Batteries Examined
I examined 4 batteries from GNB (model new), 1 battery from BetaFPV (nearly 1 12 months previous), and 1 battery from Tattu (2 years previous).
GNB 6S 1100mAh 160C LiHV
- Weight: 177g
- Dimensions: 81x39x30mm
- Advertized Capability: 1100mAh
- Measured Capability (From 4.35/cell): 1049mAh
- Measured Capability (From 4.20/cell): 909mAh
- Connector: XT60
- Product Pages:
GNB 6S 1300mAh 160C LiHV
- Weight: 198g
- Dimensions: 82x39x34mm
- Advertized Capability: 1300mAh
- Measured Capability (From 4.35/cell): 1227mAh
- Measured Capability (From 4.20/cell): 1044mAh
- Connector: XT60
- Product Pages:
GNB 6S 1500mAh 160C LiHV
- Weight: 222g
- Dimensions: 83x39x39mm
- Advertized Capability: 1500mAh
- Measured Capability (From 4.35/cell): 1375mAh
- Measured Capability (From 4.20/cell): 1180mAh
- Connector: XT60
- Product Pages:
GNB 6S 1530mAh 160C LiPo
- Weight: 251g
- Dimensions: 82x39x44mm
- Advertized Capability: 1530mAh
- Measured Capability: 1457mAh
- Connector: XT60
- Product Pages:
Tattu R-Line V3 6S 1050mAh 120C LiPo
- Weight: 199g
- Dimensions: 77x40x36mm
- Advertized Capability: 1050mAh
- Measured Capability: 1078mAh
- Connector: XT60
- Product Pages:
BetaFPV LAVA 6S 1100mAh 100C LiPo
- Weight: 192g
- Dimensions: 77x39x35mm
- Advertized Capability: 1100mAh
- Measured Capability: 1100mAh
- Connector: XT60
- Product Pages:
Capability Testing
I discharged the batteries at 2C till they reached 3.1V per cell. This low present draw stored voltage sag and warmth minimal with little wasted vitality, permitting for correct capability measurements. For outcomes, see “Measured Capability” within the battery overview earlier.
The outcomes confirmed that GNB batteries constantly fell barely in need of their marketed capability, with the 1500mAh LiHV being essentially the most notable at 8% under its acknowledged worth. Nonetheless, given their light-weight, this outcome isn’t completely stunning. For instance, the GNB 1300mAh LiHV (precise 1227mAh) weighs almost the identical because the BetaFPV 1100mAh and Tattu 1050mAh packs.
It appears GNB might have barely overstated their capability—presumably simply wanting a pleasant, rounded quantity on the label. Nonetheless, because of the upper vitality density of LiHV in comparison with customary LiPo, you’re getting barely extra capability for a similar weight. I don’t see this being a dealbreaker actually, but it surely’s necessary to maintain the true capability in thoughts when utilizing them.
Voltage Sag Testing
Within the second check, I discharged the batteries at a relentless 12A till they attain 3.3V per cell, and in contrast the voltage sag all through the complete discharge cycle. Decrease voltage sag signifies a extra highly effective battery. Admittedly, 12A is a comparatively small load for a 6S 1000-1500mAh battery pack, as a typical 5″ FPV drone can draw as much as 80A and even 100A throughout a punch-out. Sadly, that is the utmost discharge present my testing gear (SkyRC BD350) can deal with, so whereas the outcome will not be as drastic as the next present check, it nonetheless demonstrates relative efficiency variations to a level.
Moreover, bigger batteries of the identical C-rating are sometimes extra highly effective as a result of the utmost discharge present is proportional to the battery’s capability. Due to this fact, bigger batteries will usually exhibit decrease voltage sag. Because of this, it’s necessary to match equally sized batteries.
Let’s evaluate batteries of comparable capacities within the diagram:
- GNB 6S 1530mAh LiPo vs. GNB 6S 1500mAh LiHV – The LiHV clearly demonstrated higher efficiency within the first half of the discharge cycle, delivering greater voltage and extra energy. Nonetheless, the LiPo caught up within the second half and even surpassed the LiHV towards the tip.
- GNB 6S 1100mAh LiHV, BetaFPV 1100mAh, and Tattu 1050mAh – An analogous sample emerged: the LiHV confirmed stronger efficiency within the first half of the discharge, however within the second half, its efficiency leveled out and was akin to the LiPo counterparts.
Key Observations and Insights
Excessive Volt LiHV vs. Commonplace LiPo
- LiHV Benefits: LiHV packs provide greater vitality density, storing extra vitality per gram of weight, making them splendid for pilots prioritizing lengthy flight occasions. In addition they present noticeably greater energy supply in the course of the first half of the discharge cycle, which is especially advantageous for racers in search of most efficiency.
- LiHV Limitations: The efficiency advantages of LiHV batteries are primarily noticeable within the first half of the discharge cycle. Within the second half, their voltage drops to ranges comparable to straightforward LiPos, which reduces the perceived profit.
In the case of longevity, I performed testing that confirms LiHV batteries degrade quicker than customary LiPos. After 100 discharge cycles, LiHV batteries exhibited a 5.4% capability discount, whereas LiPos solely confirmed a 3.8% discount.
It’s price noting that you need to use a LiHV battery like an ordinary LiPo by charging it to 4.20V per cell as an alternative of 4.35V. This may prolong its lifespan, however you’ll solely use roughly 85% of its capability.
C Scores
GNB makes nice LiPos, however the marketed “160C-320C” C-rating is undoubtedly inflated. There’s no manner these batteries can output 170A to 340A of present with out damaging themselves. In actuality, the XT60 connectors and wires would soften lengthy earlier than reaching these currents.
From my testing, the GNB 6S 1100mAh battery carried out equally to the BetaFPV Lava 6S 1100mAh, which is simply rated for 100C. Whereas the GNB pack may seem stronger initially, that’s primarily as a result of it’s a LiHV battery. Within the second half of the discharge cycle, its efficiency carefully matched the BetaFPV pack.
Due to this fact, C-ratings ought to be taken with a grain of salt, particularly when evaluating totally different manufacturers. Every producer appears to observe its personal customary for figuring out C-ratings, making them unreliable as a sole shopping for issue. Nonetheless, inside the identical model, C-ratings can function an affordable indicator of the place a battery ranks when it comes to efficiency.
Variation in Voltage
LiHV batteries have barely greater voltage variation all through the discharge cycle. This may be impactful as a result of motor KV is immediately proportional to battery voltage, that means variations in voltage will have an effect on the quad’s energy, throttle response, and total dealing with. One work round is to activate “VBAT Sag Compensation” in Betaflight.
Charging LiHV
Earlier than shopping for LiHV batteries, make sure that your charger can deal with them—particularly, examine for a “LiHV” battery kind within the menu or the flexibility to manually set the tip voltage to 4.35V per cell. In the event you cost LiHV batteries utilizing customary LiPo settings (charging to 4.20 per cell), you’ll solely be utilizing 85% of their capability. In the event you want a brand new charger, take a look at my battery charger suggestions—all of which assist LiHV: https://oscarliang.com/choose-lipo-battery-charger-power-supply/#High-LiPo-Charger-Suggestions
Remaining Ideas: Are GNB’s New 6S Batteries Price It?
Whereas GNB barely overstates the capacities of its 6S batteries, the LiHV packs ship on vitality density and powerful energy supply—notably within the first half of the discharge cycle. These are a fantastic selection for:
- Pilots prioritizing flight time and weight discount.
- Racers needing an preliminary voltage increase for fast acceleration.
Certain, LiPo’s do last more than LiHV, but it surely’s not as dangerous as you may suppose, see my longevity testing right here: https://oscarliang.com/lihv-battery/
With that mentioned, the usual LiPos stay a price range and stable possibility for on a regular basis flying. In addition they last more, exhibit much less voltage variation, and carry out equally to LiHV packs within the latter half of the flight.
It doesn’t matter what you select, GNB continues to be a trusted drone battery model providing glorious worth and high quality. Whether or not you choose LiHV or LiPo, these batteries stay a stable selection for the FPV group.
