Batteries
AccuPen and PachPen Lithium Battery
p/n: 24-5101
3.6 volt lithium battery for the AccuPen and PachPen. 1/2 AA battery. Measures 24mm in length and 14mm in diameter. Button top.
TonoPen Lithium Battery
p/n: AX10453
3 volt lithium battery for the TonoPen. Measures 10.8mm in length and 11.6mm in diameter. Flat ends.