URGENEX 3.7V リポバッテリー 850mAh 充電式リポ JSTプラグ付き MJX X400 X400W Holy Stone X300C X400C X800 HS110 HS200 Syma X56W Sky Viper S670 V950hd S1750 V2450 RC用 クアッドコプター ドローン X5 充電器

Battery last a long time and I could fly rc planes for a long time. The price is unbeatable and and the quality is great.

I previously stated that these batteries are unable to deliver 3 amps without dropping below 3 volts. I was wrong. The mating cables I was using in the test had excessive resistance. I don't know if they are really 25C, but URGENEX deserves 5 stars for their customer service. They refunded my money when I didn't even request a refund.

Bought these for a drone, they work great, charge quickly and last longer than the originals. I have charged them many times and haven't noticed any loss of fly time. included charger works great.

2 out of the 5 don’t charge. When they are charged, I get about 3-5 minutes with my stock alias quadcopter which they do NOT fit in. They are too wide. Super cheap though. Edit: I received a full refund and got to keep the working batteries after writing this review. Very good service!

This works with a Traxxas Alias Quadcopter. It’s thicker than the Traxxas battery, and is a tight fit. Plug is the mating end for the Alias interface plug, an adapter isn’t necessary. Once it slides into the bracket, it does have a tendency to want to stay at a slight angle. If you gently push from the front and guide it with a slight lift at the back, it falls into place. Removing is the process in reverse. I use a small popsicle stick to help push it out. First flight after charge was 20 minutes. I think this is worth the money.