Battery Health

[gregrose]

Hey all, I have iStat & my battery health has always been at 100, but today I notice its at 98%...i have 60% battery right now, does this mean my battery health will never be at 100 again?

13inch mbp, bought it in september...has usually always been at 100%

 

[spinnerlys]

Have you calibrated your battery?

This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

Apple on notebook batteries

Apple Portable: Calibrating your computer's battery for best performance

Laptop Battery Guide

MRoogle is a good tool to search these fora for already existing threads about questions you have. It might be able to answer you quicker than waiting for an answer.

 

[gregrose]

ok so basically just drain the battery till it forces sleep & just leave it to charge overnight? or should i not charge it right away after it forces sleep?

 

[GGJstudios]

ok so basically just drain the battery till it forces sleep & just leave it to charge overnight? or should i not charge it right away after it forces sleep?

No. Read the FAQ link spinnerlys posted. It has the exact steps for proper calibration.

 

[qawes]

ok so basically just drain the battery till it forces sleep & just leave it to charge overnight? or should i not charge it right away after it forces sleep?

after it forces sleep leave it like that for 5 hours or more.

 

[gregrose]

after it forces sleep leave it like that for 5 hours or more.

ok so leave it in forced sleep mode for 5-6 hours, then leave it to charge for a day?

 

[GGJstudios]

ok so leave it in forced sleep mode for 5-6 hours, then leave it to charge for a day?

Read the steps. There's more to it than that, beginning before you drain it.

 

[qawes]

no, just let it charge normally to 100%, after that you can use it anyway you like.

 

[gregrose]

i did exactly what you guys said, its still at 98%, didnt work...great

 

[GGJstudios]

i did exactly what you guys said, its still at 98%, didnt work...great

Yes, it did work. If you calibrated properly, that means your reading is accurate, and you have 98% battery health remaining.

 

[gregrose]

i thought calibrating it would get it back to 100% health again, lame...its only had 40 cycles.

 

[GGJstudios]

i thought calibrating it would get it back to 100% health again, lame...its only had 40 cycles.

No, calibrating makes your reading more accurate. Nothing restores battery health. Batteries die over time. This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

 

[jetblk328i]

mine fluctuate all the time, even without calibrating. my last cycle said i was at 96, now its back up to 98.

 

[GGJstudios]

mine fluctuate all the time, even without calibrating. my last cycle said i was at 96, now its back up to 98.

That's perfectly normal, as stated in the FAQ.