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Leave the battery with the power adapter?

gusious

gusious

macrumors 65816
Original poster
Dec 2, 2007
1,277
2
Greece
Is it ok to leave the power on on a MBP when you also have it plugged with the adapter?I mean even when the battery is fully charged.

I have heard that this thing may lower the battery's health.
 
No, it doesn't hurt the battery at all to leave it plugged in, even when fully charged.
 
No, it doesn't hurt the battery at all to leave it plugged in, even when fully charged.
Click to expand...

actually you are incorrect.

leaving the power adapter plugged in will steadily decrease the battery life over time.

the correct and documented way to maximise your battery life (in any rechargeable) is to fully charge then run the battery down completely then charge again - i have 4.5 hours on an original battery in my PB 12" using this method!

battery.jpg
 
monkey86 said:
actually you are incorrect.
leaving the power adapter plugged in will steadily decrease the battery life over time.
the correct and documented way to maximise your battery life (in any rechargeable) is to fully charge then run the battery down completely then charge again - i have 4.5 hours on an original battery in my PB 12" using this method!
Click to expand...

You need to get your facts straight before challenging people. It does NOT hurt a battery or decrease its life to operate with the A/C plugged in, even after the battery is fully charged. I did NOT say to leave it plugged in for months like that! As long as the battery is calibrated every month or so, there is no decrease in battery life.
 
monkey86 said:
actually you are incorrect.

leaving the power adapter plugged in will steadily decrease the battery life over time.

the correct and documented way to maximise your battery life (in any rechargeable) is to fully charge then run the battery down completely then charge again - i have 4.5 hours on an original battery in my PB 12" using this method!

battery.jpg
Click to expand...

Yeah but letting it dry out means that you loose all the thing you've done with your PB right?Also when you charge it, is your PB on and working?Or do you shut it down?
 
google it my friend :)

i dont let it completely dry out, i plug it in when the pb prompts to recharge.
 
monkey86 said:
google it my friend :).
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From http://www.apple.com/batteries/notebooks.html
Standard Maintenance
For proper maintenance of a lithium-based battery, it’s important to keep the electrons in it moving occasionally. Apple does not recommend leaving your portable plugged in all the time. An ideal use would be a commuter who uses her MacBook Pro on the train, then plugs it in at the office to charge. This keeps the battery juices flowing. If on the other hand, you use a desktop computer at work, and save a notebook for infrequent travel, Apple recommends charging and discharging its battery at least once per month.
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After a battery is fully charged, it will not continue to overcharge if left plugged in. It stops charging when full. I don't think the OP was referring to leaving it plugged in 24/7 all year long.
 
ggjstudios said:
From http://www.apple.com/batteries/notebooks.html

After a battery is fully charged, it will not continue to overcharge if left plugged in. It stops charging when full. I don't think the OP was referring to leaving it plugged in 24/7 all year long.
Click to expand...


Correct my sister has just started at the apple store as a mac speacilist, the geniuses say when it is fully charged it no longer operates on battery power and runs directly off the mains so it no longer tries to over charge the battery.
 
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