A method and system for battery charging. In some aspects, an electrical
combination including a battery charger operable to supply a charging
current to a battery to charge the battery and a battery including a
switch having an interrupt condition, in which the switch is operable to
interrupt a discharge current from the battery. The battery is
electrically connectable to the battery charger and the supply of the
charging current from the battery charger to the battery is enabled when
the switch is in the interrupt condition.