RE: battery question
It sounds to me as though what is really happening is you have a charging issue and you may not be using the charger properly. Many types of quick field chargers are timer chargers with an auto cutoff and may or may not be peak detecting.
If you really want to know just charge your battery with an or ordinary 50-70 mah wall charger for a full fourteen hours and then check the voltage with your loaded meter.
John