Every Duracell and Energizer 9 volt alkaline battery contains 6 AAAA sub-cells. Opening a 9 volt is easy. Just crimp down on the metal curled under on the bottom. Roll back the whole thing like a sardine can. I prefer to use Duracell 9 volts because the cells just fall out as individual cells but the Energizer cells are welded together. I called Energizer and ther confirmed my suspicions. Each cell is the same unit used to make their AAAA batteries minus the metal housing. This does not detract from the functionality of the pen but does lower its weight. I have not tried opening a lithium 9 volt yet but I am certain that they are configured the same way.
The AAAA size cells from a common 9-volt battery work well as pen stylus batteries as I have used several of them recently. Keep in mind that several manufacturers of these batteries, such as Ray-O-Vac, use rectangle shaped cells that are unuseable. Duracell alkalines are the best bet for maximum life. I have purchased new packs of these at Big Lots for $1.99. The packaging is different but the batteries are Duracell alkalines. After getting to the cells, use pliers to pull off the thin, metal strips that connect the cells.
RE:Pen Stylus Battery Hack You probably have 60 AAAA batteries in your house... (modified 0 times)
Did you have to do any modifications to the cells to get them to work or did you just drop them in the stylus? I tried it myself tonight but couldn't get it to work: I carefully pulled off the little metal strips on a Duracell 9 volt, put the flat side of the battery (which I believe is the positive) up against the little contact on the stylus but I couldn't get the stylus to work. Any advice would be appreciated.
bleore, you may need to put a little ball of aluminum foil into the end of the pen tube (spring end) before you put the battery in. i had to do this in mine to make a solid contact, since the battery is slightly shorter than a standard retail AAAA.
i also put up a webpage about this hack, with pics.
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