Replacement touchscreen? 30 minute battery life?

Is it possible to replace the touchscreen on an iBook G4? And can anyone explain to me why all of a sudden my battery life is suddenly only 30 minutes? Everything was fine with the battery for the past year, and all of a sudden it only lasts 30 minutes even with a full charge. Should I just replace it? A friend told me that she had the same issue, and a replacement battery did nothing for her except cost her money . . .
Thanks . . .

iBooks have an LCD screen, not a touchscreen. Battery life is dynamic, based upon how much you use it etc. Try calibrating the battery, running on the battery untill the machine goes to sleep with the battery down to 0% on its own using (never for sleep). Then fully recharge it. Most batteries of this type have between 300-400 cycles (number of times it can be charged and discharged) before the time it runs is very short, like you are seeing. There are a few ways to check. Frist, using an app such as Coconut Battery to see how much of a charge it holds (not the % like the OSX battery monitor tells you). Another is through system profiler (not sure if this shows in 10.3.9 or if its new in Tiger) under power, and it shows how much charge in mAh. Newer ibooks start with 4500-4400 mAh and go down from there. Coconut battery, and/or system profiler will tell you how many cycles are on the battery. The larger the number of cycles the less charge it is likely to hold.

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