Hi Chris The power cord has a ring of light around it at the end that plugs into your iBook. When it lights up amber the battery is charging when it changes to a green light the battery is fully charged. It should work with just a power adapter even if no battery is installed. A battery on laptop should give you 3 years of reasonable service before it needs to be replaced. The life of the battery depends on the number charge/discharge cycles, storage temperature and they just deteriorate over time. Gerhard On Apr 29, 2004, at 2:05 PM, chris at beliefpictures.ca wrote: > Hey, > > I purchased a used G3/500 (SNOW iBook) from a user on eBay. The > original > adapter (AC) was too warn and eventually failed to work (iBook does not > power up). Now he sent me a Yo-Yo adapter and nothing happens. Is my > battery dead? Is my iBook dead? What gives? Can the iBook power up > with the > adapter alone? How do you charge the battery/know if it is charging? > Has > anyone had this much trouble with an iBook? > > Chris