Himalaya Backup Battery

Maxell ML2016 Rechargable battery. Normal Voltage: 3 V Nominal Capacity: 25 mAh Nominal Discharge Current: 200 µA Charge/Discharge Cycle Lifetime: 1500 (10% discharge depth) 500 (20% discharge depth)

product details can be found from: http://www.maxell.co.jp/e/products/industrial/battery/ml/