Specification: Brand name: NOHON Model: BM41 Compatible with: Redmi 1S\/ Xiaomi 2A\/ Mi2A Capacity: 2100mAh Standard voltage: 3.8V Limited charge voltage: 4.35V Battery type: Li-ion battery Description: 100% compatible with Redmi 1S\/ Xiaomi 2A\/ Mi2A A+ battery core provides higher conversion rate. Safer and more durable. Each battery is tested before dispatching, ensuring the quality. Over charging protection, overcurrent protection, short circuit protection and over discharge protection help protecting your safty. No memory effect, reminds the same capacity after charging and discharging. Waterproof bag help a lot while you want to take it out. Package included: 1 X 2100mAh BM41 battery for Redmi 1S\/ Xiaomi 2A\/ Mi2A 1 X Waterproof bag 1 X Certification 1 X Manual