Home / Electrical / Battery Chargers / Charger, Battery Tender Charger, Battery Tender$46.95 Charger, Battery Tender quantity Add to cart SKU: ELL800 Category: Battery Chargers Description Description Battery Tender Jr. 800. 12V 800mA Automatic Charger System. Use on all types of batteries. Lead Acid, AGM, Gel or Lithium (LiFePO4). Includes all cords for hardwire w/ plug or use clips. Can be used constantly… HOWEVER…. we don’t recommend that you leave this charger (or any charger) unattended.