What kind of charger are you using? If like you said that this is the first time you've taken the battery this far down then I can think of two scenarios:
1. If you have a constant current->constant voltage charger where all this time you've only operated in the constant voltage range and the current draw in that mode is relatively low.
2. You have a charger that only does constant voltage and the current draw in that mode can be high for a depleted battery.
In addition, I presume that you are using a ~10Ah battery? If you are charging at rates approaching 5A then you might be reducing the life of your battery.
Last edited by jruiz; 03-11-2013 at 02:14 PM.
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