Lead Acid and SLA Batteries provide the lowest cost solution but are heavy and large. We sell Sealed Lead Acid (SLA), so no worries about electrolytes, gasses, etc. We now carry Interstate SLA batteries at great prices. Interstate Batteries is the number one company in North America for replacement batteries.
Of course, we sell transformers to charge your batteries along with an automatic battery tenders that will monitor your batteries charging progress and stop charging when the battery reaches peak voltage. For chargers and transformers, follow this link.