Battery Tender 021-0123 Battery Tender Junior 12V, 0.75A Battery Charger Spark proof during lead connection, reverse polarity protected and includes a 12-foot output cord and 5-year warranty Perfect for charging all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell) and safety timer-80 hours Complete 4-step charging program (Initialization, Bulk Charge, Float Mode) allows for optimization of battery power, without overcharging Automatic charge cycle functionality switches to float mode after fully charging the battery Solid state two color LED indicates stage of charger and if the battery voltage drops too far under load, full charger output power resumes It will charge and maintain your battery so that it is ready to go when you are! It's lightweight, fully automatic and easy to use