The Amped Outdoors 3A LiFePO4 Lithium Battery Charger is the perfect accessory for rejuvenating the power for a LIFEPO4 battery used on a fish finder. The unit charges quickly; the indicator light glows red while charging and turns green when your battery reaches full charge. Keep your lithium batteries charged for your fish finder and other accessories with the fast-charging Amped Outdoors 3A LiFePO4 Lithium Battery Charger. Technical specifications Input: 100~240V Output: 14.4V 3A Suit for battery: 12.8 Volt (4Cells) 3~30Ah LiFePo4 battery Output protections: short-circuit, reverse polarity CE UL safety approved Connections (included): Quick connect Alligator clips NOTE: intended for LiFePO4 lithium batteries with battery monitoring system (BMS). Do not use with a sealed lead acid (SLA) battery.