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Versão atual de: Dan ,

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Owen - I had a few like this, I ended up putting new batteries into them. Not all of the cells are in series some are in parallel in these packs. I suspect a bad cell or two is the cause herehere (over charged).
Owen - I had a few like this, I ended up putting new batteries into them. Not all of the cells are in series some are in parallel in these packs. I suspect a bad cell or two is the cause herehere (over charged).
 
One of the things we all do with these laptops is leave them plugged in all of the time so the battery pack never gets the needed full discharge and lets be real here no one wants to work on a system forcing it to discharge knowing it will die in the middle of something ;-}
 
I bet this person used this as there desktop system, not as a traveling laptop as it was intended for.
 
In my case the two systems that are in the executive conference rm. used for presentations are always plugged-in inside a locked cabinet and very lightly used.
 
One day the CIO came by my desk telling me we needed to send these back to Apple for warranty as the batteries weren't holding a charge. After looking at the cycle history I too saw the cycle rate was way low and the discharge curve was very high (just like you). After asking some questions about these systems It hit me like a brick the battery pack was never deep cycled! I did manage to get Apple to replace the batteries under AppleCare. Now I borrow these systems for a weekend once a month giving them the needed discharge to keep them healthy.

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Postagem original de: Dan ,

Texto:

Owen - I had a few like this, I ended up putting new batteries into them. Not all of the cells are in series some are in parallel in these packs. I suspect a bad cell or two is the cause here.

One of the things we all do with these laptops is leave them plugged in all of the time so the battery pack never gets the needed full discharge and lets be real here no one wants to work on a system forcing it to discharge knowing it will die in the middle of something ;-}

I bet this person used this as there desktop system, not as a traveling laptop as it was intended for.

In my case the two systems that are in the executive conference rm. used for presentations are always plugged-in inside a locked cabinet and very lightly used.

One day the CIO came by my desk telling me we needed to send these back to Apple for warranty as the batteries weren't holding a charge. After looking at the cycle history I too saw the cycle rate was way low and the discharge curve was very high (just like you). After asking some questions about these systems It hit me like a brick the battery pack was never deep cycled! I did manage to get Apple to replace the batteries under AppleCare. Now I borrow these systems for a weekend once a month giving them the needed discharge to keep them healthy.

Status:

open