The XTAR VP4 charger is an intelligent 4-channel charger which has 4 completely independent ports. Charging currents can be adjusted automatically according to each different channel, and the user can also manually choose the current using the button switch. The screen offers the user the ability to read the charge time, precision battery cut-off voltage, displays battery power indicators, and optional currents. This is a great step up from the VP1/VP2 charger if you’re looking for 4-ports with an LCD screen. – Compatible with IMR lithium battery– Each channel is independent– Three-stage charge algorithm(TC-CC-CV)– Three charge current options (0.25 A, 0.5 A, and 1.0 A)– Soft-start function, to avoid damage from large charge current while charging.– Automatically cut off when the battery is charged fully– Precision cut-off voltage at 4.2V– Compatible with small capacity battery– Over heat protection– LCD displays each battery real time statues– Use high power intelligent step-down DC – DC circuit, greatly reduce the energy loss;– Built-in reverse-polarity and short-circuit protection circuit– Use fireproof material for the shell– 0V activation function can wake up the over-discharged/sleeping batteries– 120°angle high definition VA screen to display the charging current ,voltage and power indicator, you can see the charging status from any angle of view.