The Needle2 is a compact and practical mini charger which utilizes a USB power port to charge cylindrical rechargeable batteries of lengths ranging from 32mm to 70mm.

Specifications:
Input: DC 5V /1.0A
Idling Output Voltage: 4.2V
Output current: 0.5A / bay
Protection Mode: Short Circuit Protection; Over-Current Protection; Reverse Connection Protection
Case Material: Fire proof material
Loading spring: Military grade spring
Working Temperature : 0-40 Celsius

Indicator light:
Green: charger standby or battery fully charged
Red: charging

Its military grade loading spring and fireproof case ensure the Needle2 has a long cycle life.

http://www.golisi.com/project/golisi-needle/