Super fast charger for cylindrical li-ion 18650 batteries Xtar OVER 4 SLIM

Professional, dual-channel, compact processor charger
Xtar OVER 4 SLIM
for Li-ion batteries in sizes 18650, 20700, 21700 and others

Key Features

• Charging Li-ion batteries with a three-stage TC/CC/CV charging process controlled by a processor
• Two independent charging channels
• Measurement of internal cell resistance
• Two USB ports 5V / 2.4A each
• Three charging currents to choose from - 1A, 2A, 4.1A
• LCD display indicating the charging status of the batteries
• Reactivation function for deeply discharged cells
• Protections: short circuit, thermal, reverse polarity

XTAR OVER 4 SLIM is a professional processor charger with a three-stage TC/CC/CV charging process and an LCD display. It charges 1-2 Li-ion cells 3.6 / 3.7V of any capacity in sizes 18650, 18700, 20700, 21700, 22650, 25500, 26650.

The backlit LCD display of the Xtar OVER 4 SLIM charger continuously shows the charging status of the batteries expressed in percentages.

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 specified by the user.
• 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.

The Xtar OVER 4 SLIM charger has a reactivation function for deeply discharged cells and cells with a voltage of 0V. Many chargers on the market are unable to charge such batteries. Here, the Xtar OVER 4 SLIM charger comes to the rescue, which in many cases allows for the 'rescue' of such cells. Just insert the deeply discharged battery into the OVER 4 SLIM 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.