Just curious if anyone here is familiar with batteries? My laser sight uses a stack of (3) LR44s at 1.5VDC each. gets real old replacing them so I would like to find a cheaper solution. Maybe even rechargeable and I can make a little recharger for it. I see these single cells but looks like they are either 1.5V or 12V? Is there a 4.5-5V solution out there?