1 to 4 charger USB Smart Charger 3.7V multi interface charger

[Product Name]: USB Smart Charger (1 to 4 charger)
[Product Input]: 5.0V 2-2.5A
Product output: 4.2V 500MA
[Nominal voltage]: 3.7V
Product weight: 18g
[Applicable Product]: Suitable for charging 3.7V lithium batteries
Product Features:
Can simultaneously charge multiple 3.7V lithium batteries, with independent channel control and set overcharge protection/LED indicator (red light on when charging, light off when fully charged)