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I am not sure what the question is here. The 2 things that effect a batteries amperage output are c rating and mah. If your battery is 200mah and 10c you can draw 2000ma. In summary you multiply the batteries capacity by c rating.

For example 500mah x 80c = 40amps. One reason your batteries could b failing is if the quad is flown until it drops. Tattu is a well known brand.