400mAh 2S 7.4V 30C LiPo Battery with JST Plug for Micro FPV Racing Drone

Excellent small battery. They have worked so well and fit my tight space, I have purchased another pair.

I have used these in my RC plane and they work well. They are lasting as long as expected based on the stated mah. I'll buy more.

These were the perfect match for my rc plane and even had more mah which gave me longer flights and they seem to have more punch also with a better c rating however....they don't seem to want to charge to the 4.2 limit I have only been able to get them to 4.18 but they are great batteries so far I have only cycled them 3 times so maybe once broken in they will reach the 4.2

Good product

These are the perfect size for the project I just finished. BMJR Sniffer park flyer.

I had this AH-64 model sitting on my shelf for years and decided to give these packs a try. The stock battery fizzled or on me a long time ago and was never ask that great, even when new. These batteries, in the other hand, have been great! They charge up easy, they discharge well with no noticeable problems with capacity or output, so they good to go in my book! Wish I had thought of looking them up sooner.

I'm using these on small custom-built RC airplanes and they've been working fine. No noticeable degradation so far, no unreasonable heating, I haven't noticed any voltage sag at full throttle.

I bought these to use on my Happymodel Mantis85. They have the exact specs as the stock battery which works extremely well. I'm lucky if I get 30 seconds out of these batteries. My LVC alarm triggers at 3.2V, which these trigger within 16 seconds. Extremely disappointed. I'm trying a different 2S charger. If it makes a difference, I'll update this review. UPDATE: Crazepony sent me 4 new replacement batteries to use with my Happymodel Mantis85. They work great and I get about 4 minutes flight time.