super fast charger for cylindrical li-ion batteries 18650 Xtar SP1

Hidden in a small case is a fully professional processor charger with a three-stage TC/CC/CV charging process. Xtar SP1 Charges standard 3.6/3.7V Li-ion and 3.8V elevated Li-ion cells, as well as lithium iron (LiFePO4) batteries. Of the listed types, batteries of any capacity in sizes 14500, 14650, 16340, 17500, 17670, 18350, 18500, 18650, 18700, 22650, 25500, 26650 are supported. The type of cell is selected using a switch located on the side and the charging current is set by a button on the top of the case.

What is the TC/CC/CV charging method? It is a three-stage process of charging Li-ion cells to ensure that the cell is kept in good condition by charging with the right current at each stage and completing the charging process at the right time.
The individual steps of the TC/CC/CV process are:
•TC phase: Cells discharged below 2.9V are 'woken up' with a lower current.
•CC phase: When 2.9V is reached, the cell is charged with a constant current and voltage of the value selected by the user.
•CV phase: when the cell is almost charged, the charger switches to decreasing current charging until the appropriate voltage is reached across the cell. Once it is reached, the charging process is complete - the battery is fully charged.

Charged batteries left in the charger will undergo a natural process of self-discharge. Charging will resume when the voltage across the battery drops below 3.9V for Li-ion and 3.3V for LiFePO4.

The Xtar SP1 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 SP1 charger comes to the rescue, which in many cases allows you to 'save' such cells. Simply insert the deeply discharged battery into the SP1 charger as you would with normal charging - the charger will detect the discharged cell and attempt to reactivate it. Remark! Cells discharged below a certain level are irreparably damaged and may not be able to reactivate them. Avoid discharging Li-ion batteries too deeply – this can lead to a significant reduction in their lifespan and capacity, or lead to their complete inoperability.

Chargers from other manufacturers can significantly increase the temperature of the charged cells during charging. Too much heating of the cells can cause them to wear out faster. When designing the SP1 charger, Xtar went a step further than the competition, solving this problem in a simple way: it used power from an external power supply. Thanks to this, the temperature of the battery charged in the SP1 will increase by a maximum of 15 degrees.

The Xtar SP1 has the additional function of a power bank with a USB 5V 1A output. As a power source, you can use