XTAR VP4 is a four-channel independent lithium ion battery LCD charger. The charging current can be recognized by the battery inserted in a different channel position automatically, or users can also manually choose the current by the current button. The real-time display, precision of battery cutting-off voltage, battery power indicators, and optional current, etc., let you know the battery charging status all the time. XTAR VP4 is compatible with IMR lithium batteries and each channel is independent. It has a three-stage charge algorithm (TC-CC-CV) and three charge current options (0.