Li-ion 18650 cylindrical battery charger Xtar MC2S

Professional, dual-channel, compact processor charger
Xtar MC2S
for Li-ion batteries in sizes 18650 and others

Hidden in a compact casing is a fully professional processor-controlled charger with a three-stage charging process TC/CC/CV. It charges 1-2 Li-ion cells 3.6 / 3.7V of any capacity in sizes 14500, 14650, 16340, 17500, 17670, 18350, 18500, 18650, 18700. It is also possible to charge a single battery of size 20700, 21700 - only unprotected, 22650, 25500, or 26650.

What is the TC/CC/CV charging method? It is a three-stage charging process for Li-ion cells that ensures the cell remains in good condition by charging with the appropriate current at each stage and completing the charging process at the right moment.
The individual stages of the TC/CC/CV process are:
•TC Phase: cells discharged below 2.85V are 'woken up' with a lower current.
•CC Phase: after reaching 2.85V, the cell is charged with a constant current of 2x 1A.
•CV Phase: when the cell is almost fully charged, the charger switches to charging with a decreasing current until the voltage of 4.2V is reached on the cell. After reaching 4.2V, the charging process is complete - the battery is fully charged.

Batteries with a voltage of 4.1V or higher are treated by the charger as charged. To recharge such a battery to full, it must be placed in the charger before turning it on. Batteries left in the charger that are charged will undergo a natural self-discharge process. Charging will resume when the voltage on the battery drops below 4.1V.

The Xtar MC2S charger has a function for reactivating deeply discharged cells and cells with a voltage of 0V. Many chargers on the market are unable to charge such batteries. Here, the Xtar MC2S charger comes to the rescue, which in many cases allows for the 'rescue' of such cells. Just insert the deeply discharged battery into the MC2S charger, just like with normal charging - the charger will detect the discharged cell and attempt to reactivate it. Note! Cells discharged below a certain level may suffer irreversible damage, and their reactivation may be impossible. It is advisable to avoid excessively deep discharging of Li-ion batteries - this can lead to a significant reduction in their lifespan and capacity or render them completely inoperative.

Chargers from other manufacturers can significantly raise the temperature of the charged cells during charging. Excessive heating of the cells can cause them to wear out faster. In designing the MC2S charger, Xtar has gone a step further than the competition by solving this problem in a simple way: external power supply was used. As a result, the temperature of the battery charged in the MC2S will rise by a maximum of 15 degrees.

Included with the Xtar MC2S charger is a micro USB cable. The power adapter is not included in the set. Any charger with a micro USB cable, e.g., from a phone, or a USB socket or a computer with a free USB port is sufficient to power the charger. The recommended charger power is 2.1A (2100mA).