EFEST Slim K1 Battery Charger is a compact single‑bay USB charger designed for safe, efficient and reliable charging of lithium‑ion batteries. Perfect for vapers who need a portable solution without compromising on safety or performance.
Key Features
Single charging slot for lithium‑ion batteries (18650, 20700, 21700, and more)
Micro‑USB input for convenient power on the go
LED indicator to display charging status
Built‑in over‑charge, reverse polarity and short‑circuit protection
Compact, lightweight design – ideal for travel
Usage & Safety
Insert battery following polarity markings
Use supplied cable or quality USB adapter
Unplug when charging is complete to prolong battery life
