My battery is strange...

[nmamur]

It charges fine until about 85% and then it slows down to a trickle(estimated time is about 45 mins to completion). Im pretty sure this wasnt an issue earlier. I cant remember the exact event, if any, that made this start.

Any thoughts?

 

[SuperCompu2]

have you tried removing the cord, waiting a second or two and plugging back in? This has allowed it to charge further for me on occasion with a PowerBook my friend had.

Good luck.

 

[bwanac]

Dont macbooks have quick charge up to some percentage, and then real slow to the max.

 

[iBenzin]

Dont macbooks have quick charge up to some percentage, and then real slow to the max.

isnt that how most batteries work?

 

[orangemacapple]

when was the last time you calibrated your battery? that should clear things up a bit.

 

[deadpixels]

read this :

Charge!
The batteries found in laptops (iBooks, Powerbooks, MacBooks) and iPods charge in two stages.

The first stage is a rapid charge that pummels the battery with constant amperage and steadily increasing voltage. When the battery charges to 70% - 80% capacity, stage two begins, steadily decreasing the current while holding the voltage steady until the battery is fully charged.

Stage two is commonly referred to as the "trickle" or "topping-off" charge and normally takes tree times as long as stage one. One myth is that Lilon battery life will be maximized by frequently draining the battery to 0% and then charging back up to 100%. While grabbing a few minutes of charge time here and there will eventually cause inaccuracies in the battery's reported battery-charge and remaining-life times.

taken from here