These units have long been my "go to" charger for all of my saber installations and for usage in my shop. They are both safe and practical and that combination cannot be beat when working with these types of products.
Features
Automatically choose the most suitable charging current (0.5A, 1.0A)
Automatically stops when charging is complete and restart charging function, so you can keep the cells inside the charger overnight
Reverse polarity and charger short circuit protection
ABS durable fireproof shell with perfect heat dissipation and high temperature resistance
Compatible with any USB power and wall adaptors, no need to spend extra money to buy more parts
0V activation function can rescue your over-discharged cells. (This feature for advanced users only, charging over-discharged batteries is generally a safety concern)
Three stages of charging (TC-CC-CV) to maximize your units lifespan
Specifications:
Input voltage: DC 5V 1.0A
Charge current: 0.5A / 1.0A
Cut-off voltage: 4.2V +/- 0.05V
Cut-off current: <= 80mA
Dimensions: 92mm x 27mm x 26mm