This self-contained battery tester is also a battery holder AND a key chain. Carry in pocket or purse to test if your battery is weak, dead, or at full power.
Features
- Self-contained battery tester
- Convenient for pocket or purse
- Tests sizes 13, 312 and 675 (NOT compatible with size 10)
- Red light emitted to show battery life
- Storage compartment for 2 extra batteries
- Quick and easy to use
