The Battery Tender Junior Selectable is a trickle charger with a brain. It will keep your Lead Acid, AGM or Lithium battery fully charged so that it is ready to go when you are. It's fully automatic, compact, and lightweight.
This smart charger has battery chemistry selection and will automatically sense and select the battery type, then complete a 4-step charging program, (Initialization, Bulk Charge, Absorption Mode, Float Mode) with a max output of 800mA. It will automatically switch to float/maintenance voltage after fully charging the battery. If the battery voltage drops too low, full charging output resumes. It also has a two color LED that indicates state of charge.
Reverse hookup is mitigated with reverse polarity protection.
Includes a 12 foot output cord, a 5 year warranty and the fact that it meets CA and OR appliance energy efficiency standards for battery charging systems make this a great little unit.