The BT189 Battery Tester requires no batteries to operate and can test the following batteries:
AA
AAA
C
D
9V
All button type batteries
Reduces waste, saves money. Don't throw away perfectly good batteries!
Many toys & appliances will stop working if even only one of the batteries is flat, even though the other batteries might be fine. With this battery tester you can see which batteries are still good & continue to use them.
This unit is strong enough to last for ages, with a classic proven design.
