5 amp battery charger maintains and charges all type of AGM, GEL, SLA, Flooded(WET), Calcium type deep cycle automotive or marine 4Ah-100Ah 12V battery.(NOTE: It can not work with Lithium-ion battery) Fully automatic high frequency charging delivers 3 stage charging, automatically switching from fast charge, to top-off, then to trickle charge. Built in circuit protection guards against against reverse polarity, sparks, overcharging, over-current, open-circuits, short-circuits and…