Watch and 1.5V 3V button digital Battery Tester battery capacity meter
The color and logo printing are able to customized according to customer's order.
Specification: This machine not only operates as a battery tester for 1.5v and 3v button batteries, but can also test power for watch batteries before you open them. If it is low battery, the machine will make a sound with lighting, which doesn't keep in synchronism with the watch. These all will warn a customer in advance that their watch requires a new battery.