3.7V 500mAh 20C Battery for RC Helicopter

Pros: I was looking a little battery for my little rc helicopter that gives it a little more autonomy, and this is the perfect one for it. I tried it and the battery autonomy is around 5-7 min longer that the original battery. It's a good battery for this price.

Cons: The only problem is that you can't put it in a little little helicopter, like 2 channels helicopters, because it is a little heaviest. I have tried it in a little 4 channel helicopter and it can fly.

Other: I put it in a little helicopter, but you can use it in anything that runs with a little battery.

Pros: Its a good battery. Actually I thought it could not install, but everything worked out.

Cons: Nothing, its all right! Only one caveat, it is a little heavy, so I could not install on a model helicopter that I have, which uses small batteries. Still it's a good battery

Other: Its a good battery, and supply my expectatives!! First I wanted to make an adjustment on my Syma 107 helicopter, but as it is a bit heavy, it did not work. So I managed to install it in another helicopter largest, and was very good. Perfect! I really recommend it!

Pros: A good construction battery, compatible with little-medium Helis. I've made the first charge and it got plenty charge. It seems to be a great value 1 cell battery with high capacity.

Cons: It seems to be little heavier. The battery doesn't have the manufacturer identification, so It's difficult to get more detailed information.

Other: If it's compatible with your model I recommend it.

Pros: Good replacement battery, useful for DIY projects.

Cons: Feels a bit on the cheap side, packaging of the item could be better.

Other: If you need a replacement battery for your helicopter this one might be too heavy. If the weight and size are OK it works perfectly once mounted.