CS-MUB400SL : Battery for Xiaomi 2A, M2A, Mi2A and others - Replaces Xiaomi BM40, BM41 M3 Mobile SM20 X they are pre-charged

they are pre-charged

includes 3xAAA alkaline batteries

Alcatel C2820009C2

and they RETAIN THEIR CHARGE for over a year if not used

The CS-AUB203NB is a replacement rechargeable battery for Asus products

CS-MUB400SL : Battery for Xiaomi 2A, M2A, Mi2A and others - Replaces Xiaomi BM40, BM41 M3 Mobile SM20 X they are pre-chargedThe CS MUB400SL is a replacement rechargeable battery for Xiaomi products. This battery replaces the following OEM part number(s): Xiaomi BM40 Xiaomi BM41 This battery is compatible with the following model(s): Xiaomi 2A Xiaomi M2A Xiaomi Mi2A Xiaomi M3 Xiaomi M3A Xiaomi Hongmi 1s Xiaomi Redmi 1s Xiaomi Redmi 1s Dual SIM Specifications: Voltage 3. 7V Chemistry Li ion Capacity 2100mAh Dimensions 64. 48 x 55. 43 x 4. 80mm Color Black Weight 62 g