The flexible and well-equipped X4 charger charges Li-Ion and NIMH/NiCd batteries. Functions such as automatic switch-off when the battery is full, optimisation of the battery life TC-CC-CV, three-stage charging, 0V activation, reverse polarity protection, short-circuit and overload/overcharge protection are functions that are already built into the X4 as standard. Integrated power supply unit with two connection options for power supply (mains cable and USB 5V 2.1A). The X4 can also boast a powerbank function via 5V 1A USB output.