Specicfications:1. Brand: Xiaomi2. Model: HR63. Type: Double A Battery4. Battery: 1800mAh5. Quantity: Four6. Voltage: 1.2V7. Maximum discharge current: 3600mA(20\u2103)8. Recommended charging conditions: 550mA*4 hours9. Charging temperature: 0-40\u2103 10. Discharge temperature: -5~50\u2103 11. Weight: 30g  Features:  1. One Nickel Metal Hydride Rechargeable Battery is equal to 1500 disposable battery. 2. 1500 times cycle life、 it still have 60% capacity after cycle 1500 times. 3. No memory effect、 use as you want. 4. Low self discharge design、 placed a year later there are 80% of the electricity. 5. Excellent low temperature performance、 you cau use it under -20\u2103.(We suggest you to use it in above -10\u2103)  Note: All data are from laboratory、 may be different from the actual data.  Package includes:  1* 4 Double A Nickel Metal Hydride Rechargeable Battery.