@FUCKINGWHOCARESDUDE @LukeAlmighty @clarjon1 Ok kids, today we're learning about batteries.
It's not "some" 9V batteries, that's how all 9V batteries are made. Ever wondered why rechargeable 9V batteries are actually 7.2V? 6 x 1.5V (alkaline cells) = 9V but 6 x 1.2V (Ni-Cd or Ni-MH) = 7.2V
And not just 9V, any battery that isn't a single cell is, well, mutiple cells lol. These 12V batteries from the previous post? 8 x 1.5V button cells. 12V car batteries? Guess what, 6 x 2V lead acid cell in series
Here are some nominal cell voltages, grab the nearest battery pack (pack, get it?) you can find and check it's nominal voltage, it should be divisible by one of them:
Zync carbon and alkaline (non rechargeable) -> 1.5V
Ni-Cd and Ni-Mh -> 1.2V
Lithium -> 3.7
Lead acid -> 2V
@clarjon1
Or, if you want to save even more: