For lithium battery operating voltage: 3.6-4.2V.

Features:

• Input Voltage: 5V (such as micro USB)
• Maximum Charge Current: 1A
• Maximum Protection Voltage: 4.2V ±1%
• Minimum Protection Voltage: 2.5V
• Maximum Operating Current: 3A
• Product Size: 2.6 * 1.7cm/1.02 * 0.67in
• Weight: 2g

Protections:

• Short circuit protection.
• Overcharge protection.
• Over-discharge protection.
• Over-current protection.

Package Content:

• 5 x Lithium Battery Charging Board