Klarus K2A dual slot charger for 18650, 20700 and 21700 batteries, protected or unprotected. Digital display tracks voltage and charge percent, and USB power bank output charges your phone in a blackout.
Product Description
Two independent slots is the starting point, but what actually separates the K2A from a basic dual-bay charger is how it allocates current: up to 2A when only one bay is loaded, dropping to 1A per bay once both are running at the same time, rather than a fixed rate applied regardless of how many cells are actually charging. QC3.0 and PD3.0 input support means that rate is genuinely achievable with a compatible fast-charging adapter, not just a specification on paper that a standard 5W phone charger can't actually deliver.
Physical compatibility is worth calling out specifically: the K2A accepts protected cells up to 78mm long, longer than many dual-bay chargers on the market allow, which matters because a protected 18650 or 21700, the version with a built-in safety circuit adding a few extra millimetres of length, is exactly the kind of cell that gets rejected by chargers sized only for bare unprotected cells.
Key features
Digital display shows live voltage and charge percentage, per bay
USB-C/USB-A port doubles as a power bank output
Handles 18650, 20700 and 21700, protected or unprotected
QC3.0 / PD3.0 fast charging input
The same USB-C/USB-A port that accepts input power doubles as an output for charging a phone or small device directly from whatever cell is currently seated in the unit, turning the charger itself into a compact power bank during a blackout without needing to remove the battery and put it in a separate power bank shell.
Battery and cable are sold separately, in keeping with how most enthusiast-grade chargers in this range are sold, since buyers typically already have preferred cells. For a charger that also handles NiMH and NiCd chemistries in the same slots as lithium, rather than lithium exclusively, the plain Klarus K2 is the broader-compatibility option, worth comparing if a household's charging needs go beyond lithium-only cells.
Product Specifications
Specification
Details
Charger Type
Smart Charger
Number of Slots
2
Supported Battery Sizes
18650, 20700, 21700
Fits Button Top Batteries
Fits Flat Top Batteries
Supports Protected Batteries
Supported Battery Type
Li-ion
Charging Current
0.5A / 1A / 2A
Input Port
USB-C
Display Type
LED
Specification
Details
Safety Protection
Overcharge protection, Short circuit protection, Reverse polarity protection
It uses a NULL input. Use a standard USB wall adapter (5V, at least 1A recommended) to power the charger. The charging cable may or may not be included — check the package contents.
No — this charger does not include batteries unless clearly stated in the product title or package. You need to purchase compatible rechargeable batteries separately.
You can buy it from Lumen Vault Kenya and enjoy fast and reliable delivery in Nairobi and across Kenya. Contact us via phone or WhatsApp for quick assistance or to place your order easily.
Yes – we offer fast nationwide delivery across Kenya within 24 hours. Nairobi & surrounding towns usually get same-day or next-day delivery.
Chargers
