Can I use an external battery with my SparcBook?
Yes. Tadpole sells an external battery that is rated at 12V, 5.7Ah (1.7kg/3.75lbs) which they claim will last for 5 hours. A simplier/cheaper solution would be to get a 12V battery and put a barrel connector on it yourself. Plug the battery into the same socket that you plug the AC adapter into. WARNING: be SURE to NOT exceed the SB’s power spec or you may damage the input power circuity. NEW: I have been told that the external battery from Tadpole was EOL’ed sometime around 1997. If you want an external battery, you are going to have to make one yourself.