Digital Battery Voltage Tester — AA, AAA, 9 V and Cell Options

Check the voltage of a compatible loose battery before fitting it to a device. A digital display provides a numerical reading, with separate contact positions for supported cell formats.

Listed cell references

• AA, AAA, C, D and N formats.
• 9 V 6F22 and 12 V 23A.
• 1.55 V cells at the matching marked contact.
• 3.7 V lithium formats: 18650, 21700 and 26650.

Match the test position

Check both the cell format and nominal voltage against the tester's markings before use. A voltage reading is a useful reference, but it does not by itself measure usable capacity or guarantee performance under load. This is a tester, not a battery charger.