Wholesale Sinometer BT558 Self-Powered Battery Tester, Checks AA, AAA, C, D, 9V types of regular or rechargeable batteries
Don't you just hate when reaching for the remote control and find out it's not operating because the weaken batteries? How can we test the little battery for remaining power? How much longer can we use those batteries before replacing it? This little compact tester unit is the answer. Just hook up the battery and you have an instant answer.
Sinometer BT558 Self-Powered Battery Tester