The GAL 1830 is only suitable for use with Bosch Wireless Charging technology batteries. Couple the Bosch GAL 1830 Wireless Charger with a Bosch wireless battery and the benefits of the system are immediately apparent. Wireless Charging technology means you can charge your Bosch wireless Li-Ion battery without ever having to remove it from the tool. When not in use, place the tool on the charger, your battery is continuously ‘topped up’. Next time you need the tool, pick it up and off you go. The technology uses contactless energy transfer by means of induction. An induction coil in the GAL 1830 Wireless Charger generates a magnetic alternating field. The battery contains another coil which induces a voltage and generates a charging current. The system is very robust as there are no contacts that may become damaged; dust, dirt or water splashes make no difference to the charger’s performance. Charges both 10.8V and 18V Bosch wireless batteries.