Charger / power bank for cylindrical Li-ion batteries 18650 / 20700 / 21700 Xtar PB2S black

Professional, compact processor charger / power bank
Xtar PB2S in black
for Li-ion batteries in sizes 18650 / 20700 / 21700 

Hidden in a compact casing is a fully professional processor charger with power bank functionality featuring a three-stage charging process TC/CC/CV. It charges Li-ion cells 3.6 / 3.7V of any capacity in size 18650 / 20700 / 21700 - only unprotected. The intelligent built-in balancer controls the charging and discharging process. Thanks to it, the lifespan of the cells is significantly extended. The charger always starts by charging the more discharged cell. Once a similar charge level is reached, it starts charging both batteries simultaneously. The same happens during discharging. The charger starts discharging from the more charged cell, and when the charge levels equalize, it begins to discharge both batteries simultaneously (power bank function).

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 2.9V are 'woken up' with a lower current.
• CC Phase: after reaching 2.9V, the cell is charged with a constant current of 2x2A / 2x1A / 1x2A.
• CV Phase: when the cell is almost charged, the charger switches to charging with a decreasing current until reaching a voltage of 4.2V 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 charge such a battery to full, it should be placed in the charger before plugging it into power. Batteries left in the charger while charged will undergo a natural self-discharge process. Charging will resume when the voltage on the battery drops below 4.1V.

Ładowarka Xtar PB2S has a reactivation function for deeply discharged cells and cells with a voltage of 0V. Many chargers on the market cannot charge such batteries. Here, the Xtar PB2S charger comes to the rescue, which in many cases allows for the 'rescue' of such cells. Just place the deeply discharged battery into the PB2S charger, just like with normal charging - the charger will detect the discharged cell and attempt to reactivate it.

Warning! Cells discharged below a certain level may suffer irreversible damage, and their reactivation may be impossible. Avoid excessively deep discharging of Li-ion batteries - this can lead to a significant reduction in their durability and capacity or render them completely inoperative.

Ładowarki from other manufacturers can significantly raise the temperature of charged cells during charging. Excessive heating of cells can cause them to wear out faster. In designing the PB2S charger, Xtar has gone a step further than the competition, solving this problem simply: it uses power from an external power supply. This way, the temperature of the battery being charged in the PB2S will rise by no more than 15 degrees.

Included with the Xtar PB2S charger is a USB TYPE C cable. The power supply is not included in the set. To power the charger, any charger with a USB port is sufficient, e.g., from a phone or a computer with a free USB port. A charger supporting QC3.0 / PD3.0 is recommended to fully utilize the charger's capabilities. It is possible to use a charger with lower power, but in that case, the charging time will be extended.