Here’s a cool trick you can do with a 12-volt battery (cost= less than $2.00 for two). When you open it up and peel back the case with a screwdriver, you’ll find eight 1.5 volt button-cell batteries, the kind you use for watches and calculators, that normally cost about $4.99 each.
You can power six different electronic devices with the batteries you remove from just one 12-volt battery, and save about 40 bucks.
Kipkay to the rescue once again haha. Yea this has helped me out a LOT in the past when I needed a button battery and only had some 12 volts.