Posts Tagged ‘1S Gens Ace


The 1S 3.7V 300 mAh Gens Ace 30C LiPo batteries are designed for use with small scale RC helicopters such as Blade mCPX and other similar models such as WLtoys v922, Turnigy FBL100 and others. These are intended to be used as an alternative to the stock battery and provide higher capacity and higher discharge rates to ensure longer flight time and better performance. We are used seeing very good results from Gens Ace batteries so far and we are having high expectations for these batteries, but let us see how they will perform in our tests.

Official Battery Specifications:

– Capacity: 300mAh
– Voltage: 3.7V
– Max Continuous Discharge: 30C (9A)
– Max Burst Discharge: 60C (18A)
– Weight: 7.8 g
– Dimensions: 42.3×18.83×6.98 mm
– Charge Rate: 1-3C Recommended, 5C Max
– Discharge Plug: E-Flight Ultra Micro


We have started the tests with a 1C discharge rate (0.3A) for the 1S 3.7V 300 mAh Gens Ace 30C LiPo battery and we’ve managed to get 308 mAh as a maximum capacity. This is a bit more than the manufacturer rating for this battery or with other words good start for the battery as we were expecting the Gens Ace meets its capacity rating. However what comes as a not so good surprise is that the constant discharge rate is about 20C maximum and not 30C as the specifications say it should be. Andjust to be sure it is not a problem with a particular unit, we have tested multiple batteries and all of them were not able to show better results. Gens Ace also sell 1S 300 mAh batteries with 15C rating and there could be some mix-up, however the boxes of the four batteries we have tested say that we’ve received the 30C model and not the 15C (we have ordered the one with 30C discharge rate). So a bit of a disappointment from this particular product from Gens Ace, but this just shows that not all of their products may be so good as we expect them to be.

The performance of the 1S 3.7V 300 mAh Gens Ace 30C LiPo battery in our tests:

– 308 mAh at 0.3A load (1C)
– 284 mAh at 1.5A load (5C)
– 280 mAh at 3.0A load (10C)
– 267 mAh at 4.5A load (15C)
– 214 mAh at 6.0A load (20C)
– 20 mAh at 7.5A load (25C)