High quality and durable in performance
Short-circuit protection
Over-temperature current adjustment
Protection of opposite connection
X4 charger can charge four battery once time
With over-charge protection for every port， batteries are safer to you

Specifications:
Charger: X4
Input: DC 5V
Output: 4.2V (more or less within 5 present)
Plug type: US plug with EU adapter
Plug: 3A US Charger Plug with EU Adapter
Battery: 3.7V 240mAh 25C
Package Content: 4 x 3.7V 240mAh 25C Battery， 1 x X4 Charger， 1 x US Charger Plug with EU Adapter