having a hard time calibrating the battery

[renodion]

I have a 17 months old white macbook with 423 load cycles and the current battery capacity is 44%. ouch.

it doesn't go to sleep anymore when the battery is low nor does it let me know when it is running on reserve power (it just shuts down suddenly).

i tried calibrating it about a month ago and the battery capacity went up to 92% but it went down really quickly. would my battery be failing?

 

[iLog.Genius]

Considering you have 423 cycles on it your battery is basically at it's end of life.