Gens ace 7.4V 450mAh 2S LiPo Battery Pack -25C with JST-SYP-2P Plug for RC Heli 250 Helicopter and Small Airplane

Work great for what I need them for, bought 2. I bought a JST to PH 2-pin adapter to make it work. I used this one: https://www.amazon.com/gp/product/B07RMXFBXH/ref=ppx_yo_dt_b_asin_image_o07_s00?ie=UTF8&psc=1 This solves 2 problems IMO. 1) It makes it so you don't have to continually plug & unplug directly into the ESC (which down the road will cause that connector to wear out). 2) This battery is much better than the stock one.

I bought this to power the flight computer for my Loc Precision LOC-IV X2.

For someone like me that isn’t meticulous about keeping my lipos at storage voltage or keeping in an optimum storage temp when not in use, these have been far better than other big name batteries as far as staying able to take a charge, NOT PUFFING UP, and withstanding a lot of cycles. Not recommending leaving them in a hot car or fully charged for weeks but these have taken such abuse well when all others dont.

Overall, I think this pack is a good buy. My only gripe is that the balance connector is quite large and nothing like what the product photos depict. This is a problem for us hobbyists flying micro quads where we like to keep things on the compact side. And, despite the connector's larger size, I don't think it is solidly built enough to handle big crashes. I'll have to wait and see after some flights to determine whether the bulky connector is justified for a battery that is supposed to be compact.

Great little battery to avoid going through AA's like crazy in my rc transmitter, it fits perfectly and even though it is only 450mah I seem to get more time on a charge than a full set of new AA batteries on my power hungry digital transmitter.