Beats breaking out the meter to test the battery.
http://www.instructables.com/id/Easy-3v-Coin-Cell-Battery-Tester/?ALLSTEPS
Beats breaking out the meter to test the battery.
http://www.instructables.com/id/Easy-3v-Coin-Cell-Battery-Tester/?ALLSTEPS
One Response to One cork, and LED, and electric tape and you have a simple tester for coin batteries