This charger is designed for LiFePO4 batteries in a 4S or 12v - 14.6V configuration. 

The charger will use fast charging at the beginning then slow for better accuracy near the end pf the charge cycle. It will stop charging once the battery is fully charged. The charger will maintain the battery and will automatically keep the battery between 95% - 100%.

Charger Features:

Battery compatibility: LiFePO4, LFP, LiFe battery types (14.4V - 14.6V)

LED indicator: Red = Charging, Green = Fully Charged, Maintaining

Safety Protection: Over Voltage Protection, Short Circuit Protection, Reverse Output Protection, Auto Charge/Cutoff

Input: AC 100-240V 50-60Hz (North America US Plug)

Charging voltage: 14.6V +/- 0.1V

Maximum Charging Wattage: 25W

Maximum Charging Current: 2A

Package includes: 1 x LiFePO4  Battery Charger, 1 x Pair Alligator Connection Clamps