Charger / Power bank for 18650 batteries XTAR PB2S

Professional processor charger for Li-ion 18650/20700/21700/26650 cells with power bank function
three-stage charging method: TC /CC / CV
two independent charging channels
reactivation of deeply discharged cells and 0V cells
charging current: 2x2A / 2x1A / 1x2A | charging voltage: 4.2V
efficient converter - efficiency 92%
magnetic cover for the charging compartment
powered by USB TYPE C QC 3.0 and PD 3.0 - (power adapter not included)
protections: thermal, short-circuit, against reverse insertion of the battery


A fully professional processor charger with a power bank function with a three-stage TC/CC/CV charging process is hidden in a small housing. Charges 3.6 / 3.7V Li-ion cells of any capacity in size 18650 / 20700 / 21700 / 26650. An intelligent built-in balancer controls the charging and discharging process. Thanks to it, the life of the cells is significantly extended. The charger always starts by charging the more discharged cell. After reaching a similar charge level, it starts charging both batteries simultaneously. The same is true for discharging. The charger starts discharging from the more charged cell, when the charge levels are equal, it starts discharging both batteries simultaneously (power bank function).

What is the TC/CC/CV charging method? It is a three-stage Li-ion cell charging process that ensures the cell is maintained in good condition by charging with the right current at each stage and ending the charging process at the right time.
The individual stages of the TC/CC/CV process are:
• TC phase: cells discharged below 2.9V are 'wake 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 fully charged, the charger switches to charging with 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 fully charge such a battery, insert it into the charger before connecting it to the power supply. Charged batteries left in the charger will undergo a natural self-discharge process. Charging will resume when the battery voltage drops below 4.1V.

The Xtar PB2S charger has the function of reactivating deeply discharged cells and cells with a voltage of 0V. Many chargers on the market are not able to charge such batteries. This is where the Xtar PB2S charger comes in handy, which in many cases allows you to 'rescue' such cells. Just insert a deeply discharged battery into the PB2S charger, as with normal charging - the charger will detect a discharged cell and attempt to reactivate it.

Attention! Cells discharged below a certain level are irreparably damaged and may not be reactivated. Too deep discharge of Li-ion batteries should be avoided - this may lead to a significant decrease in their durability and capacity or lead to their complete inoperability.

Chargers from other manufacturers can significantly increase the temperature of the charged cells during charging. Excessive heating of the cells can cause their faster wear. When designing the PB2S charger, Xtar went one step further than the competition, solving this problem in a simple way: an external power supply was used. Thanks to this, the temperature of the battery charged in the PB2S will increase by a maximum of 15 degrees.

The Xtar PB2S charger comes with a USB TYPE C cable. The power adapter is not included. To power the charger, any charger with a USB socket, e.g. from a phone or a computer with a free USB port, is enough. Recommended charger supporting QC3.0 / PD3.0 to get the most out of the charger. It is possible to use a charger with less power, but in this case the charging time will be longer.

Product Data:
manufacturer: Xtar
charger model: PB2S
supported battery types: 3.6 - 3.7V Li-ion batteries
supported battery sizes: 18650 / 20700 / 21700 / 26650
maximum battery length: 70mm
input voltage and input current compliant with QC3.0 and PD 3.0 (5V/2A | 9V/2A | 12V/1.5A)
power socket: TYPE C
power adapter included: NO
recommended power adapter: minimum 5V 2A
charging method: processor controlled TC/CC/CV
charging current in CC phase: 2x 2A / 2x 1A / 1x 2A
charging termination voltage: 4.2V ±0.05V
termination current: 120mA
additional functions reactivation of deeply discharged cells and 0V cells
protections: thermal, short-circuit, against reverse insertion of the battery
dimensions: 125 x 58 x 28mm
weight: 85g
set contents: PB2S charger, USB TYPE C - TYPE A cable,
warranty: 24 months