Check the listing for details. Miboxer C4 LCD 4 Slots Battery Charger 1.5A 18650 14500 26650 21700 EU US Plug. Condition: New. Listed at 39.90 USD. the C4 charger have Discharge function in 4th slots C4 is a smart charger designed by miboxer team,compatible with almost all type of rechargeable batteries like Li-ion/IMR/INR/ICR/Ni-MH/Ni-Cd/LiFePO4 batteries,as well as a high grade performance.With a large digital LCD display,easily to understand battery charging parameters and processes. C4 has different charging features and modes according to different type battery charging.It use standard Li-ion battery charging mode when work with Li-ion/IMR/INR/ICR/LiFePO4 batteries;Use a full charge mode for Ni-MH, Ni-Cd batteries charging process. Feature: Input:AC86-265V/DC12V Output(Max):4.2V±1%/4.35±1%/3.6V±1%/1.48V±1% Size:103x158x38mm Current:Li-ion/LiFePO4:(High:800mA*4,Low:350mA*4)Ni-MH/Ni-Cd:( All slot support 100-1500A current) Compatible with all different type of cylindrical rechargeable lithium battery. Up to 100-800mA charging speed in 4th slot. High precision calibration of voltage source. Automatically stops charging upon charging compleion. Reverse polarity protection and short circuit prevention. Automatically detects battery power status and displays charging progress. Automatically detects battery resistance. Each battery slot controls and charges independently. Support for lithium battery repair function. Compatible with DC12V car charging function. Made of fire resistant,flame retardant PC material. Designed by optimal heat dissipation. Excellent circuit design,3 years warranty. Package : 1 x Charger 1 x AC86-265V Charger Cable 1 x User Manual 1.Battery resistance measurement . Put htebattery in any channel ,the charger will display the battery voltage, and Automatically measure the battery resistance. (1) LCD screen display ---mΩ, charger testing the battery resistance,detection time about 8seconds. (2)LCD screen display 068mΩ charger measured battery resistance is 68mΩ. Note. The internal tesistance display time is about 6seconds ,the battery resistance measurement is completed,automatically enter the charging mode. 2.Charging Current setting (1) Press and hold the mode button until the lcd screen 888mA flashes, (2)Press the mode key repeatedly to toggle the charge current,Select the range of 100mA to 800mA. (3)Press and hold the mode key to determine the current.