Description
The Efest SLIM K4 is a compact four-bay smart charger built for shops and enthusiasts who need to keep multiple loose cells topped off at once. It charges up to four rechargeable Li-ion batteries independently, with an onboard microchip that reads each cell and manages its charge separately so mixed sizes and states of charge can all sit in the same tray.
A rear-mounted Type-C USB port handles power input, replacing the older Micro-USB standard for a faster, more stable connection off any 5V/2A adapter or power bank. The charger automatically distributes current based on how many bays are loaded, delivering up to 1A per bay when charging two cells and 0.5A per bay across a full four-cell load. Per-slot LED indicators show charge status at a glance and switch to solid when a cell is full.
Spring-loaded rails made from piano wire give a smooth slide-in fit for a wide range of cell lengths, and a full safety suite guards against short circuits, over-charge, over-discharge and reverse polarity. A dependable, high-turnover accessory that pairs naturally with vape mods and other Li-ion device sales.
Efest SLIM K4 Type-C USB Charger Compatible With:
Rechargeable Li-ion cells: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650
Any 5V/2A USB power source or wall adapter via Type-C cable
Efest SLIM K4 Type-C USB Charger Key Features:
Charging Bays: 4 independent slots (quad-channel)
Input: Type-C USB, DC 5V / 2A
Charging Current: Auto-adjusting: 1A per bay (2 cells) / 0.5A per bay (4 cells)
Display: Per-slot LED indicators; solid when fully charged
Compatible Batteries: Li-ion 10440 up to 26650 (18650, 20700, 21700, 26650 and more)
Safety Protections: Short-circuit, over-charge, over-discharge, reverse-polarity, 0V activation recovery
Build: Flame-retardant housing with piano-wire spring rails
Certifications: FCC, CE, RoHS
Warranty: 3-year manufacturer warranty
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Efest SLIM K4 Type-C USB Charger Purchase Includes:
1 x Efest SLIM K4 Type-C USB Charger
