Try running your battery all the way out, then charge it full.. That should 'reset' the battery meter.
It's better for overall battery life to charge LIP batteries before they get too low... (I rarely let mine go below 40-50) but this frequent recharging throws the meter off a bit. It's recommended that they be fully discharged every 30 power cycles or so. (full power cycles, so every 60 recharges if you were to charge at 50%.)
Hope this's helpful.
