It's not. All 9V's are made from six 1.5V cells, but “AAA” has a specific meaning. No 9V uses them, they're too big to fit in the case. The cylindrical cells that look like AAA's are smaller - they're not AAA's, and they have a much lower capacity.
Are 9V and 1.5 V the same?
A single cell of the typical type used in household batteries is 1.5 volt. A 9V battery actually has 6 small 1.5V cells inside it. D, C, AA, and AAA are all single cell batteries at 1.5V.3 Dec 2005
What devices use 9V?
A nine-volt battery, either disposable or rechargeable, is usually used in smoke alarms, smoke detectors, walkie-talkies, transistor radios, test and instrumentation devices, medical batteries, LCD displays, and other small portable appliances.9 Feb 2021
What size battery is a 9V?
The dimensions for 9 volt batteries are H 48 mm × L 25 mm × W 15 mm (1.9 in × 1 in × 0.6 in). However these standards still allow for varying in size for a 9 volt battery. The maximum size permitted, for example, is 48.5 mm × 26.5 mm × 17.5 mm.
Is a 1.5 V battery the same as a 9V?
A single cell of the typical type used in household batteries is 1.5 volt. When you put two together in series you get 3V. A 9V battery actually has 6 small 1.5V cells inside it. D, C, AA, and AAA are all single cell batteries at 1.5V.3 Dec 2005