Fast charger for cylindrical Li-ion 18650 Xtar SC2 USB-C batteries

Key Features

• 2 independent charging channels
• CPU-controlled three-stage TC/CC/CV charging process
• high charging current - 2x 2A / 1x 3A
• powered by any USB charger (recommended with QC 3.0)
• small dimensions - easy to carry
• Deeply discharged cell reactivation function
• protections: short circuit, thermal, against reverse polarity

Xtar is a renowned manufacturer of high-quality Li-ion battery chargers, flashlights and Li-ion batteries. Xtar products are sold in more than 120 countries, including the most important countries. in the USA, Germany, Japan and Russia. Xtar uses the highest quality materials to manufacture its chargers – from the plastic of the housing to the high-performance electronics. All Xtar chargers have the CE certification required for European markets.

Hidden in the small casing is a fully professional processor charger with a three-stage TC/CC/CV charging process. Charges 3.6/3.7V Li-ion cells of any capacity in sizes 18650, 18700, 20700, 21700 - also protected, 22650, 25500, 26650.

What is the TC/CC/CV loading method? It is a three-stage charging process for Li-ion cells that ensures 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 different 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 of 2x2A / 1x3A.
• CV phase: when the cell is almost charged, the charger switches to charging with decreasing current until the voltage of 4.2V on the cell is reached. Once 4.2V is reached, the charging process is complete - the battery is fully charged.

Batteries with a voltage of 4.1V or higher are treated as charged by the charger. To fully charge such a battery, insert it into the charger before turning it on. 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 SC2 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 SC2 charger comes to the rescue, which in many cases allows you to 'rescue' such cells. Simply insert the deeply discharged battery into the SC2 charger as you would with normal charging - the charger will detect the discharged battery and attempt to reactivate it.

Remark! Cells discharged below a certain level are irreversibly damaged and may not be able to reactivate. Avoid discharging Li-ion batteries too deeply - this can lead to a significant reduction in their durability and capacity or lead to their complete inefficiency.

Chargers from other manufacturers can significantly increase the temperature of the charged cells during charging. Too hot cells can cause them to wear out faster. With the SC2, Xtar has gone one step further from the competition by solving this problem in a simple way: using power from an external power supply. Thanks to this, the temperature of the battery charged in the SC2 will increase by no more than 15 degrees.

The Xtar SC2 charger comes with a USB-C cable. A power adapter is not included. To power the charger, all you need is any charger with a USB-C cable, e.g. from a phone, or a USB socket, or a computer with a free USB port. The recommended minimum power of the charger is 2A).