you may quite familiar with watch batteries, but it isn't a common battery, it was specially designed for kinds of watch poker scanning camera. We always call it as 3.7V lithium battery. Poker scanning camera is quite important item for poker analyzer(except the all-in-one poker analyzer as it has built-in poker camera). So many customer request more operate time for watch poker camera battery.

1. The capacity of this battery is 700mAh, it means the operate time can last 1to 2 hours.

2. It can be charged with universal charger and easy to change.

3. We can design as your reasonable requirement.