Everything comes from China products reviews site purchased in China
These 12V batteries, also known as 23a, are common in garage and car remotes. They are ideal for projects of transmitters, because they are small with high voltage.
Here in Brazil it would cost dear buy a stack of these. Sells only in some places and it costs $ 10 each. In china you can buy 5 for only 12 real.
You can highlight as is using. The remote control for my garage condo uses this type of battery.
She has roughly half the size of a AAA battery.
Remove
Below I leave the link for anyone who wants to buy this battery at DealExtreme:
http://www.dx.com/pt/p/mincell-disposable-500mah-23a-l1028-12v-alkaline-batteries-5-pcs-175507
