Prolong battery life: Proper charging current is conducive to extending the battery life. Built-in protection circuits can effectively prevent over-current,over-charge,over-voltage, short-circuit,overload,and temperature protection combined with XTAR'S original soft-start function,making charging safer. Dragon VP4L PLUS Charger (Noted: Can't charge 1., 5v battery. Battery Charger,XTAR Dragon VP4L PLUS Charge most Button & Flat top 3., 6v 3., 7v Li-ion/1., 2V Ni-MH batteries and 11., 1v 3S battery packs. Sofirn Universal 4 Bay Smart Battery Charger with LCD Display for 18650 21700 26650 14500 16340 and AA AAA Rechargeable Ni-MH Ni-Cd Batteries (4.2V Output Get the XTAR Dragon VP4 Plus 4 Bay Digital Battery Charger, the flagship charger from Xtar. With multiple charging speeds and compatibility with various lithium-ion batteries, this charger is perfect for all your needs If you are not sure whether your battery can be charged with this charger or not, pls contact us for professional advice., ) VP4L PLUS Smart-battery-charger help to check the health of your batteries: Come with a pair of probes,which can detect the voltage and internal resistance of the battery;Under the Test Mode,charger can test the real capacity of your batteries,recored function of the charger will also record your test results for comparison. Or you can unplug the power supply and insert Li-ion batteries to charge USB devices using the VP4L PLUS as a power source. 0.5A 1A 2A Charging Current XTAR Dragon VP4L PLUS 18650 Rechargeable Battery Charger For 3.6V 3.7V Li-ion/1.2V AA AAA Ni-MH Batteries And 11.1V 3S Batteries, Professional Charger 21700 VP4L PLUS Charger Package list:1x VP4L PLUS Charger,1x 12V 3A UK Adapter,1x Charger Pouch,A Pair of Probes, 1x 3A Car Adapter,1x Manual.