Kastar Dual Fast Charger, 110-240V Worldwide Input Voltage, wide range compatibility, it can charge for batteries with 6.8V - 16.8V of any capacity. Intelligent Dual Fast charger LCD displays charging status, battery capacity, it can charge two batteries at the same time, change different plate, suitable for most of digital batteries. Intelligent contral: Control MCU can automatically identify the voltage of the battery, going intelligent charge when being charging, and prevent overcharge. Charging type is CC/CV with well reliability and high efficiency, with the function of pre-charging and li-ion battery 0V activation which can effectively extend battery life. Compatible with: Topcon BT-60Q BT-61Q BT-62Q BT-65Q BT-66Q GMS-2 Survey Instrument Battery, Topcon BC-30 BC-30D BT-30 Charger, Topcon Total Stations FC-200 FC-2200 FC-2500 GPT-7000i GTS-750 GTS-751 GPT-7500 GTS-900 GTS 900 GTS-900A GPT-9000 GPT 9000 GPT-9000A ROBOTIC