Charger for Li-ion and NiMH Xtar VC8 cylindrical batteries

Professional, four-channel, compact processor charger
Xtar VC8
for Li-ion and Ni-MH batteries in sizes 18650, AA, AAA and other...

VC8 is a professional processor charger with three-stage charging process TC/CC/CV for Li-ion cells and 0ΔV and -ΔV for Ni-MH batteries. Charges 1-8 Li-ion 3.6 / 3.7V and Ni-MH cells of any capacity in sizes AAA/R03, AA/R6, 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18500, 18650, 18700. In two extreme channels it is possible to charge batteries with low internal resistance even with 3A current (only 1 cell).

The Xtar VC8's backlit LCD display shows up-to-date information about the charger's operating status: the voltage of the charged batteries, the charging current, the charge used to charge the cells, the internal resistance of the cells, indicates errors and informs the end of charging. You can change the type of information displayed at any time by pressing the "disp" or mode button. Switching between charging modes is possible by holding down the mode/displ buttons longer. Charging current at any time can be changed to higher / lower - the charger measured the internal resistance of the cell and negotiates the maximum (optimal) charging current. Use the "Grad" option to measure battery capacity. After completing the process of assessing the quality of the cell from the display, you can read the battery capacity and there is an internal resistance.

The maximum charging current is 3A and is only available for two extreme channels and only when the middle channels are not used - the maximum charger with this current is able to charge 1 battery at a time. If 2 batteries are placed, the maximum charging current will be 2A. If 4 cells are placed, the maximum charging current will be 1A. maximum charging current will be limited to 0.5A.

What is the TC/CC/CV charging method? It is a three-stage li-ion cell charging process that ensures that the cell is maintained in good condition by charging with the right current at each stage and completing the charging process at the right time.
The different stages of the TC/CC/CV process are:
• TC phase: cells discharged below 2.9V are 'awakened' by a lower current.
• CC phase: When 2.9V is reached, the cell is charged with a constant current of 0.1A to 1A (depending on the power source used and the number of batteries charged).
• CV phase: when the cell is almost charged, the charger switches to charging with a decreasing current until the 4.2V voltage on the cell is reached. After reaching 4.2V, the charging process is complete - the battery is fully charged.

The charged batteries left in the charger will undergo a natural self-discharge process. Charging of Li-ion batteries will resume when the voltage on the battery drops below 3.9V. For Ni-MH batteries, charging is not resumed when the voltage due to self-discharge decreases.

The Xtar VC8 charger has the function of reactivating deep discharge cells and 0V cells. Many chargers on the market are unable to charge such batteries. Here comes the Xtar VC8 charger,which in many cases allows you to 'rescue' such cells. Simply insert a deeply discharged battery into the VC8 charger, as with normal charging , the charger will detect the discharged cell and attempt to reactivate it.

Attention! Cells discharged below a certain level are irreparably damaged and may not be able to be reactivated. Avoid too deep discharge of Li-ion and Ni-MH batteries - this can significantly reduce their durability and capacity or lead to their complete failure.

Complete with Xtar VC8 charger we get a USB cable. No power supply is included. A QC3.0 (9V / 2A) charger is needed to power the charger. It is possible to use a weaker power supply, VC8 will adjust the charging current to the capabilities of the power source.