1A 3.2-18.5V Multipurpose Battery Charger with With Photovoltaic Cell MPPT Function Complete Charge Controller for Singleor Multi-cell Lithium ion, LiFePO4 or Lithium Titanate Batteries MPPT is 18V : Input DC 18-28V,Output DC 1.2-17V Adjustable(3.6V 4.2V 4.3V 4.35V 8.4V 12.6V 16.8V) MPPT is 12V : Input DC 12-28V,Output DC 1.2-11V Adjustable(3.6V 4.2V 4.3V 4.35V 8.4V) MPPT is 9V : Input DC 9-28V,Output DC 1.2-8V Adjustable(3.6V 4.2V 4.3V 4.35V 7.2V) MPPT Disable(Change R5 to 12Kohm,it is recommended to buy DD28CRTA) : Input DC 7-28V,Output DC 1.2-21V Adjustable(3.6V 4.2V 4.3V 4.35V 8.4V 12.6V 16.8V 21V) The maximum charge current / output current is 1A, but you can change the current by changing the value of the Rcs resistor. Can be used as Voltage Source when Battery is Absent Automatic Conditioning of Deeply Discharged Batteries Automatic Recharge Led indicator :"CR" LED is charge status indicator Battery Overvoltage Protection Operating Ambient Temperature-40℃ to ＋85℃ Size : 45 x 20 x 15mm Weight : 7.3g Applications: 18V 12V 9V Solar battery charging Car battery charging Mobile Loadspeaker Electric Bicycle Charger UPS Portable Industrial and Equipment Standalone Battery Chargers Hand-held Equipment Battery-Backup Systems Portable Industrial and Equipment Standalone Chargers for Lithium ion, LiFePO4 or Lithium Titanate Batteries Colour:black Material:PCB + electronic components<br><br>Package Contents: 1 x MPPT Solar Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.