Charging a Lipo Battery?

Discussion in 'General Electronics Chat' started by arrow, Jan 20, 2008.

  1. arrow

    Thread Starter New Member

    Jan 20, 2008

    I have 2 LiPo batteries in series, and have used a commercial charger to charge them up (SMART 2020). This works well.
    What I did then was disconnect the wall cube but left the batteries plugtged into the charger.
    Two days later I checked the voltage on the 2 batteries in series and it was 1.5V!!!

    The charger must have DRAINED my batteries.

    The problem now is that if I plug in the wall transformer (power the charger), it reports an error upon charging. It is incapable of charging the batteries!

    My questions are:
    (a) What can I do when the LiPo's are over-drained?
    (b) Is it common for a charger that is not powered to drain the batteries?

    Thank you in advance.