At What Voltage Should A 1.5 V Battery Be Replaced. And since AA and AAA batteries are only 15V you have to choose 2V. The familiar AA and AAA battery types are 15 volts and the rechargeable versions are 125 volts.
A 9V is truly a battery. So most battery euipment is designed to work down to 11 or even 10 volts. A reading of 13 to 15 volts means the battery is good.
The proper voltage for AAAAA alkaline battery is 15V The proper voltage for AAAAA NiCdNiMh rechargeable battery is 125 Volts.
In the case of a 15V this corresponds to 08V and for a 9V battery about 54V. I checked the old ones with my analog battery tester and my DMM. Battery chemistry can vary from one battery to the next so we say about 126 volts because a battery could be fully-charged at only 125 volts or 128 volts. The elevated bump on an AA and Triple A batteries.
