Believe it or not....
Ceramic SLA batteries have a temperature dependant charge limit time curve with temperature dependant cut-off voltage otherwise the MTBF of the battery suffers quicker. If you are not fussy use a 750W hair dryer on 1500 watt on half power @120Vac with a full wave 20A 300V Schottky $5 bridge so it is cool between Line (hot) and the toaster so you get 750W/120V= 6.25Amp and put a 1 hr timer switch on the plug.
Normal 1C charge rate is acceptable or 1 hr charge. ( I charged my car this way in a snow blizzard when my battery was dead in 1971.)
But really you need to specify the battery part number and get the charge curve before you specify a SLA battery charger. Each supplier has different suggested curves with temperature compensation, unlike Sealed top Auto batteries , Ceramic is used in molded brick SLA's for more deep discharge charge life cycles.
it is not the same chemistry.
Wires to battery will be say 120Vac open circcuit but now current limited by big series resistor. If you are serious.. you will report your battery part number and mfg. then do some research.