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Return & Refund policy

Diy battery pack must get the cells balanced (same voltage ) before assembly. Later if there happens don’t know how to assembled or wrong assembly is not accepted refund. Professionals will detected voltage/resistance/appearance and other issues before every shipment, we can only ensure that the single battery is good, when arrival you can test the cells within 15 days, after that means batteries have no problem, does not provide return nor refund. If you found problems you can contact us for return or refund. Battery can only be unused (the electrode intact, no welding, no wear, the appearance good) to provide return. Any return behavior buyers need to be responsible for shipping fee.

1).Warranty period:5 years(from the date of successful delivery),if the single battery capacity less than 80% initial capacity, take the test pictures or video to us,we will replace it or give

Satisfied solution.

2).If any miss or damaged for the shipping. Please contact us firstly, then send us the picture or video to check. In case of loss of cargo or the battery is damaged and can not be used or

There is a greater risk of use, we will communicate with buyer if resend it or replace it or refund the product cost.If buyer send back the cells to seller,buyer should pay for theshipping cost.

3).These situations not provide return nor refund

* After the assembly or assembly process happen any problem, such as the protection board connected to the wrong wire burned lead to battery damage, charger failure, the assembly

Error or unbalanced assembly, etc.

*For damage caused , such as battery bulge/welded, battery pack without protection bms caused by charging.

*If your refund is allowed,you will receive your upfront payment within 15-30 working days.

Contact us at for questions related to refunds and returns.