Time To Charge MBP Battery?

[czeluff]

hello to all,

it takes my MBP 5 hrs to chrage the battery all the way. Is this typical? That seems like a long amount of time.

cz

 

[WildCowboy]

From a depleted state, it should take about 2 hours to charge up to about 80% in fast charge mode, and then an additional two hours to top off using trickle charge mode. Read more here.

 

[czeluff]

yea

yea, it seemed like it still took about 4 hrs to do the initial 80%. should i take it in for someone to look at? or do u think that 20%/hr is good enough?

cz

 

[adrianblaine]

yea, it seemed like it still took about 4 hrs to do the initial 80%. should i take it in for someone to look at? or do u think that 20%/hr is good enough?

cz

It always "seems" like a long time though. Were you using it while it was charging? That always will take longer as well.

 

[e12a]

How did you discharge the battery in the first place? How old is your battery? Did you calibrate?

-Enough to force sleep?


Did you turn the computer back on even after forced sleep? I'm not sure if this is possible, but

I was reading up on li-ion batteries that if they are discharged beyond a certain threshold, they may go into something called "Deep discharge", where it may take significantly longer to charge a battery. it is also unsafe to charge a Li-Ion battery once it's beyond the threshold. Occasionally, the battery's safety mechanisms will activate rendering the battery useless (irreversible).