Pila IBC (TM) Professional charger 18650 3.7V Li-ion battery Although the Pila IBC (TM) Pro is not cheap, but also makes more than many less expensive charger. Half-full battery I could just invite such a deep unloaded specimen. Even with hedged batteries does this charger along well. The batteries are after charging is complete, not overloaded but also really full, as have numerous measurements shown. The charging current of 600mA heats the battery only moderately and reduces charging time. This charger I can only recommend.