The VC4's multi-format formula, in USB-C and 21700-protected compatible
The XTAR VC4L carries over the VC4's base formula (4 bays, wide Li-ion and Ni-MH compatibility, LCD screen) while adding two concrete upgrades: a modern USB-C input and bays long enough to house protected 21700 cells, which are bulkier than bare cells.
From 10440 to 32650, plus protected 21700 support
The VC4L accepts lithium-ion batteries from 10440 to 32650 (18650, 20700, 21700 included), as well as Ni-MH and Ni-Cd batteries in AA and AAA formats. Its distinguishing feature over the base VC4 is bay length, long enough to fit protected 21700 cells, a longer version than the bare cell that shorter-bay chargers sometimes refuse. Each bay works independently, so a Li-ion cell and a Ni-MH battery can be mixed freely, or a heavily discharged cell with an almost full one.
Automatic detection, but current shared across channels
Each bay automatically detects the chemistry and level of the inserted battery, with nothing to configure. The point worth knowing before buying concerns current management: bays 1 and 4 can each charge at up to 1A, but as soon as a battery occupies bay 2 or 3, all four channels drop to 0.5A. A full charge of 4 batteries then takes noticeably more than two hours, a trade-off XTAR made to keep the device simple and affordable rather than a design suited to charging four batteries at once.
Detailed LCD screen and USB-C input, but no advanced analysis
For each bay, the LCD screen shows the battery's voltage, the current charging rate, the capacity already charged in mAh and the detected type, a real plus over a simple indicator light. USB-C power, compatible with a standard wall charger, a power bank or an equipped car socket, makes everyday use easier. The VC4L does not, however, offer an internal resistance test, real capacity measurement, or any USB output to back up an external device, features reserved for its bigger sibling the VC4SL.
Auto-stop at full charge, with no further detail
Each bay stops automatically once the battery is full, avoiding overcharge. The body stays compact despite the longer bays for protected 21700 cells: 234g for 154 x 115 x 34 mm.
Against the VC4SL, the Nitecore UM4 and the MiBoxer C4-12
How does the VC4L compare with other 4-bay USB-C chargers?
| Criterion | XTAR VC4L | XTAR VC4SL | Nitecore UM4 | MiBoxer C4-12 |
|---|---|---|---|---|
| Max current | 1A (bays 1 & 4), 0.5A otherwise | up to 3A, adjustable | 1.5A (1 battery), 0.5A (4 batteries) | up to 3A per bay |
| Internal resistance test | No | Yes | No | No |
| USB output | No | No | No | No |
| Observed price | £21.99 | £29.41 | ≈ £24 | ≈ £28 |
The VC4SL charges faster thanks to its adjustable current up to 3A and adds an internal resistance test, for a lower price on this market: a serious case against the VC4L. The Nitecore UM4 and the MiBoxer C4-12 remain more affordable rivals, with simultaneous 4-battery charging that also stays limited to a low current. The VC4L keeps the edge on protected 21700 compatibility and one of the more complete screens in its category.
Who the XTAR VC4L is for
This charger suits anyone who mainly charges one or two batteries at a time, including protected 21700 cells, and wants a readable screen over USB-C. To charge 4 batteries quickly or analyse their internal resistance, the XTAR VC4SL is better equipped; for maximum format compatibility without protected 21700 support, the basic XTAR VC4 often costs less.
