ITEM NAME:2pc 4 AAA 1.5 V charger USB rechargeable AAA Li-po-Battery Battery. I5W3 Ba R4E5 Description&Preview.Compatibility: AAA / LR03 battery. Battery capacity refers to battery capacity. This is normal and reasonable. Input: Micro USB (5 V). Battery capacity: 400 mAh. You can follow below process to chontact us.