* Battery power icon and percentage display. * Optional charging currents, Automatically detect battery type and choose the most suitable charging method. Using TC-CC-CV charging for Li-ion battery and pulse charging for Ni-MH/Ni-CD battery. You can mix and charge all kinds of batteries together. VC2 Plus Master can intelligently recognize/ display/ charge Ni-MH and Li-ion batteries at the same time. * The backlight will automatically get into energy saving mode without any operation after 2min (inserting battery or pressing button). And can be off by pressing the button for 1.5s to save energy and avoid light pollution. * XTAR 0V Activation Function can revive "damage" (low voltage) battery to save your money. * Compatible with any 5V USB power including USB wall adaptors, cell phone chargers, solar panel, PC USB, etc. Use 5V 2.1A input power can maximize the advantages of the VC2 Plus. Input Power: 5V DC / 2.1A Net Weight: 115g Dimensions: L131*W66*H33mm Operation Temperature: 0-40℃ Apply to:10440/14500/14650/16340/17335/17500/17670/18350/18490/18500/18650/18700/22650/25500/26650/32650 3.6V/3.7V Li-ion/IMR/INR/ICR and AAAA/AAA/AA/A/SC/C/D Ni-MH/Ni-CD batteries Notice: 1. Uses a 5V 2.1A wall adaptor to get full charging speed and the Power-Path USB output function. 2. To maximize the battery lifespan, you can follow below tips to choose charging current: For AA battery /A battery /SC battery /C cells /D cells, both 0.5A and 1A charging current are excellent. For all Li-ion batteries, 0.5A charging current is great. For the Li-ion batteries which capacity is higher than 2500mAh, choose 1A charging current can enjoy a fast speed.