XTAR SC2 USB-C 2-Slot Li-ion Battery Charger with 2A Fast Charging and 0V Activation

Charge two Li-ion cells simultaneously at up to 2A per slot with the XTAR SC2, a compact USB-C powered charger that revives over-discharged batteries from 0V and protects them with reverse polarity, short circuit, and temperature monitoring.

Overview

The XTAR SC2 is a dual-slot charger engineered for high-drain Li-ion batteries, supporting sizes from 18650 to 26650 including 20700 and 21700. Its USB-C input accepts standard 5V/2A adapters, delivering a total 2A charging current split across both bays. The CC/CV algorithm ensures a precise 4.2V cut-off, while the integrated 0V activation function can rescue deeply discharged cells that other chargers reject.

What stands out

• 2A fast charging in a single slot or 1A per slot when charging two batteries simultaneously
• 0V activation revives over-discharged Li-ion cells, extending battery life
• Comprehensive safety: reverse polarity, short circuit, overcharge, over-discharge, and temperature protection
• Clear LED indicators show charging status at a glance
• Durable ABS housing with a wide operating temperature range of 0–40°C

Technical details

• Input: DC 5V / 2A via USB-C
• Compatible chemistries: Li-ion (IMR, INR, ICR)
• Supported sizes: 18650, 18700, 20700, 21700, 22650, 26650
• Charging cut-off voltage: 4.2V ±1%
• Charging algorithm: CC/CV
• Protection: reverse polarity, short circuit, overcharge, over-discharge, temperature monitoring
• Status indicators: LED
• Housing material: ABS
• Operating temperature: 0–40°C

Our verdict

The XTAR SC2 combines fast charging with robust safety features and a 0V activation function, making it an excellent choice for users who need reliable and efficient charging for high-drain Li-ion batteries.