The voltage of the Maxell 371 coin cell battery is 1.55V. Its capacity is 45mAh, and the discharge current rate is 50mA. Its chemistry is silver oxide, and it is free of mercury. This coin cell is built for low drain items like analog watches, and it has leak resistant processing for safe handling. The Maxell 371 holds two times the capacity of energy that a classic alkaline coin cell does. The voltage on the Maxell 371 remains reliable at that rate until the battery needs to be discharged; this is known as a flat discharge rate.