just because they have tama's batteries doesn't mean they have the gigas. Remember, the tama batteries are also used in things like claculators and watches.
THEY'RE CALLED BUTTON CELL BATERIES AND THERE ACTUALLY PRETTY EASY TO FIND. A SECRET THAT STORES ARE TO STUPID TO FIGURE OUT IS BY AN ITEM THAT INCLUDE THOSE BATTERIES. FOR EXAMP. I GOT A BOOK LIGHT THAT HAD THOSE TYPE OF BATTERIES FOR $1.45 INSTEAD OF BUYING A PACK FOR SIX BUCKS