LiFePO4 Battery 5 years
Sodium ion Battery 5 years
LTO Battery 10 years
NMC Battery 5 years
LiFePO4 Battery Pack 5 years
The warranty period is from the date you receive.
We only replace new cell for free due to the failure of manufacturing.
Before the shipment, we will detect the cell voltage/resistance/appearance and other issues. we can only ensure that single cell is good before the shipment.
When arrival you can test the cells within 1 week. If you find any problems, please contact us for refund or replace. Any return behavior buyers need to be responsible for shipping fee.