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MBP (A1260) Kills Batteries

My A1260, (S/N 8YK0) worked fine until the first battery finally gave up the ghost after 3 years. I bought a new one from Apple and it charged fine, but after a month of normal use that changed. The pull down menu for the battery said "Replace Now" and the computer would not last 10 seconds without the charger. I suspected there was something wrong with the computer so I bought two, new, OEM batteries from a third party: TechOrbit. I verified that it replaced the A1175 and was a Li-ion, 10.8V, 60Wh battery.

These two batteries had the same problem the first day. I believe there is something in the computer, a logic board or similar, which is responsible for recharging management but is failing somehow.

Am I on the right track? If so, what part is the likely culprit?

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Try resestting the PRAM and SMC and see if that helps.

Also if before the "old battery" went south if you installed or updated any applications a change in background processes running could cause the sudden battery drain. Check Utilities > Activity Monitor > CPU tab, set the pop-up menu to Active Processes, click on the CPU column header to sort, and see if anything is using a high amount of CPU capacity, .

If this answer was helpful please remember to mark it accepted.''

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Resetting the PRAM and SMC was the only way I could start the computer without the battery. Before that it would simply sit there when I pressed the I/O button. That issue is resolved now.

I did as you said and looked at the Activity Monitor; nothing out of the ordinary - 90% idle. I would not call the problem a sudden battery drain so much as the computer seems to be damaging the battery. Perhaps it is overcharging.

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