EFEST Slim K2 Battery Charger is a dual‑bay USB charger built for efficient and safe charging of lithium‑ion batteries. Its slim, lightweight design makes it ideal for travel or home use, delivering reliable performance without taking up space.
Key Features
Dual independent charging bays – charge two batteries at once
Compatible with multiple lithium‑ion sizes (18650, 20700, 21700, and more)
Micro‑USB input for convenient on‑the‑go power
LED indicators to display individual battery charge status
Integrated over‑charge, reverse polarity and short‑circuit protection
Slim, lightweight body – perfect for everyday carry
Usage & Safety
Insert batteries following polarity markings on each bay
Connect to a quality USB power source
Remove batteries when fully charged to prolong lifespan
Keep away from extreme heat, moisture and direct sunlight
