$19.9-Nitecore UMS4 Charger UMS4 Charger, the newly-designed intelligent USB battery charger from Nitecore, comes with four slots, capable of charging 4 batteries simultaneously and controlling each slot independently. The total max output is 4000mA, and the max output of single slot is 3000mA. Its LCD display can show real-time charging information. The charger utilizes built-in safety protections to prevent short circuits, overcharging, improperly inserted batteries. It is constructed from durable and fire-retardant PC materials. In addition, the UMS4 supports various batteries and is compatible with USB adapters, power banks, solar panels and more. Details: 1. Charge four batteries simultaneously and independently 2. QC input enabling a total max output of 4000mA 3. Charging speed up to 3000mA in a single slot 4. LCD display for real-time charging information 5. Charging program specially optimized for IMR batteries 6. Automatically detects battery power level and selects the appropriate voltage & charging mode 7. Compatible with USB adapters, power banks, solar panels and more 8. Internal resistance and battery health detection 9. Energy saving function 10. Unique cooling fins design 11. Intelligent temperature regulation 12. Constructed from durable and fire-retardant PC materials