Battery Tender® Junior 800 Selectable Battery Charger - For Lithium Ion, Lead Acid, AGM, GEL LiFe PO4 / LFP, Fully Automatic, 5 Year Warranty, .8 Amp Charge Rate

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Finally! A FULLY AUTOMATIC charger that works on ANY 12 Volt Lithium, Lead Acid, AGM or GEL battery in ANY situation!  


• This charger works with AGM, flooded, GEL, or lithium (LiFePO4) batteries.

ISM™ micro-controller constantly updates charge sequence for smooth transitions between charging steps.

• The most cost-effective solution for long-term maintenance of 12V batteries in any vehicle stored in or outdoors.

Fully Automatic “Plug and Play” - Simply connect to the battery and plug it into the nearest power socket, the rest is fully automatic.

• 4-Step Charging - Qualification, Bulk, Absorption and Float.

• Recommended for Lifepo4 lithium battery brands.

Includes all safety features such as reverse polarity protection, no spark connection and short circuit protection.

 Comes with Alligator Clips and Fused Ring Terminals.

5 year limited warranty.



“Body” of Charger

Length             =          3-3/4"        

Width              =          2-3/8"     

Depth              =          1-3/4"



• (1) Fully automatic battery charger.

• (1) Direct connect fused harness / ringlet connector with weatherproof cap.

• (1) Set of positive and negative battery clips.


We also offer a faster, more powerful 5 Amp chargers for Lithium Batteries.

1 Review Hide Reviews Show Reviews

  • 4

    Posted by Nuno on 10th Mar 2021

    This little battery charger is great. The only reason I only gave it 4 ⭐️, is because it says it “fully automatic” but it really isn’t. You still have to push the select button to choose witch type of battery to charge.