I've got a white G4 iBook, running OS X 10.4.11, and the battery is reading 127 cycles but will not charge. The meter shows 4% in the header, and in System Profiler it reads there's voltage but not charging. I've tried re-setting the PMU, no change. The battery itself shows one flashing light on the manual check. Is it cactus? It's an older machine but there's not many cycles on it. I tried to download Coconut but it told me it wouldn't open on my OS.