Banggood Dear customer,we have been committed to providing better products and better quality of service to our customers. If you have any questions or suggestions about our products, you can contact us anytime:http://www.banggood.com/Contact-Us_hi111. We will always be here to help you to solve the problems:)Best regards,Banggood Team

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PaulFillion Wish I had read the reviews before ordering them. Haven't tried them yet, but hope to soon. However, the reviews read about the same as the "ZOP" batteries I have used, and they are absolute garbage. Customer service doesn't seem to understand that you can't fly an expensive model around if you don't know when it will suddenly lose power and fall out of the sky.

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PaulFillion Voltage sag, internal resistance, and "C" rating are all related. The voltage sag is the internal resistance times the current draw. The voltage sag times the current is the amount of heat generated in the battery, and it is this heat that limits the "C" rating which if exceeded causes the cells to swell and fail. It is obvious that the 'C" rating of these batteries and the ZOP batteries are flat lies.

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PaulFillion Interesting to note that most of the positive comments come from customers who have not flown them yet. The rest come from people who don't have chargers that can measure the amount of charge they take to re-charge. Anybody who has used them and understands batteries has negative comments.

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PaulFillion Can anybody who knows what they are doing recommend a good brand? I am in Thailand and local selection is very limited. Shipping restrictions are such that Banggood is the only supplier I know of that ships to Thailand at reasonable rates.

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