XTAR VC2 Plus LED Display USB Universal Battery Charger with Pouch (VC2Plus) XTAR 0V Activation Function can revive damaged (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.No need to buy other adaptors. Use 5V 2.1A input power can maximize the advantages of the VC2 Plus.Automatically stop charging when complete and restart charging function makes it safe to keep the batteries inside the charger overnight. LCD display shows detailed charging status, USB output function Wide adaptability to charge different size and types of batteries Countdown function tells the remaining time to fully charge