A complete workbench charger over USB-C
The Xtar VC4SL is a smart four-bay charger built for rechargeable cell users, particularly flashlight, vaping, or camera gear enthusiasts. It automatically detects each inserted cell's chemistry to apply the right charging profile.
From 10440 to 32650, among the widest in this segment
On the Li-ion 3.6/3.7V side, the VC4SL accepts 10440, 14500, 16340, 18350, 18650, 20700, 21700, 26650, and up to 32650 formats, including protected 18650 and 21700 cells. On the NiMH/NiCd 1.2V side, it takes AA, AAA, and other cylindrical formats. LiFePO4 chemistry isn't explicitly listed, though, unlike the Nitecore UMS4.
Adjustable current from 0.25A to 3A
You can set the charging current for each bay, from 0.25A to 3A, to protect a small cell or quickly recharge a large 21700. A single occupied bay reaches up to 3A, two bays get 2A each, and all four get 0.5A or 1A.
The VC4SL goes further than a simple charger: a dedicated function measures a cell's real capacity, and a storage mode brings cells back to an ideal preservation voltage, alongside a discharge function.
LCD screen with internal resistance, a valuable data point
The LCD screen shows in real time the voltage, current, capacity charged, and internal resistance of each cell, useful data for spotting a tired cell before it causes trouble in a device.
A generous footprint, a cable that falls short
USB-C power with QC3.0 lets you plug the VC4SL into a wall adapter, a power bank, or a car outlet, a real flexibility plus.
Who the VC4SL is for
This charger suits anyone wanting a versatile, readable model with the flexibility of USB-C, without stepping up to a high-end analyzer charger. It charges 18650 and 21700 cells as easily as everyday AA and AAA batteries.
For anyone specifically needing to charge LiFePO4 cells, the Nitecore UMS4 remains the safer choice, since that chemistry isn't explicitly listed here.
