Klarus K2 SMART Battery charger
The Klarus K2 is a double bay portable charger that can double as power bank for any USB devices. The K2 features an LED display that shows the user the charging process and allows the user to choose the charging current between 0.5 Amp and 1.0 Amp. This incredible charger also features an auto-activation function that is able to reactivate over-discharged short-circuit protected Li-ion batteries. However, it will not charge a battery that cannot be reactivated. The K2 also features DV/dt control technology that charges Ni-MH and Ni-Cd batteries more fully. It can charge a wide variety of batteries including: 18650, 16340, and more.
For safety and durability, the K2 charger is crafted from fire-retardant ABS plastic and features optimal heat dissipation to prevent the charger from overheating. To protect the battery and provide safer charging, the K1 built-in reverse polarity protection, overcharge protection, and short-circuit protection.
Lithium Ion (3.7V - 3.85V)/LiFePO4