2. The voltage is 9V, using disposable batteries and rechargeable batteries.

The battery charge can be seen from the position of the pointer:

1. "Full battery": GOOD – Good;

2. “Low battery”: WEAK – weak battery level;

3. “No power left”: REPLACE – The battery needs to be replaced.

Universal Button Battery Checker Tester for AA, AAA, C, D, 9V
Don’t guess which batteries to keep and which to discard.
Place the battery between the two points of the battery tester.
And the easy-to-read display will immediately indicate whether your component is defective.
Or if you can squeeze in a few more minutes of battery life.
Checks the power level of all 1.5V & 9V batteries
Easy to read, color-coded meter indicates power level
1.5V miniature cells for tests
Three results: red = replace, yellow = low power, green = good
If the needle does not move, verify that the battery is touching both contacts before making a conclusion.
It is completely dead.
The battery tester can be used to test the following sizes:
1.5V:
AAA, for HP16, MN2400, R03
AA, HP7, MN1 500, UM3
C, HP11, MN1400, SP11, LR14, UM2
D, HP2, MN1,300, SP2, R2,0, UM1
9V: PP3, MN1604, 6F22, 006P
NOTE:
The battery tester activates when the battery is being checked. Keep the testing time as short as possible to avoid unnecessary battery consumption.

Color: Black
Item size: 110*59*25 mm
Net weight: 51g

Note: The AAA battery is not included

Packing contents:
1 x Battery Tester