Battery Tender 16-18 Ah Lithium Battery


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  • 18 Month Shelf Life
  • Up to 80% Lighter than Equivalent Lead Acid Batteries
  • 5X the Life of Lead Acid Batteries
  • Quad Terminal Configuration
  • 2000+ Deep Cycles at 80% Depth of Discharge
  • Can be mounted in almost any direction

Warranty Information

  • 3 Year Limited Warranty (Direct through Battery Tender)
    •  0-12 months: Free Replacement
    • 13-24 months: 50% Off
    • 25-36 months: 35% Off

Replacement Information

The Battery Tender BTL18A300C Lithium Battery will replace the follow battery sizes

Y50-N18L-A, Y50-N18L-A3, Y60-N24-A, YB18-A, YTX20-BS & YTX20L-BS

Please read the installation instructions before purchasing this battery. The BTL18A300C may be significantly smaller than your current battery and will require the use of supplied foam shims for proper fitment.

Additional Information
Brand Battery Tender
Battery Voltage 12 Volt
Cold Cranking Amps 300 CCA
Lead Acid Ah Equivalent 16-18 Ah
Battery Chemsitry LiFePO4 (Lithium Iron Phosphate)
Length 6.49" (107mm)
Width 3.38" (56mm)
Height 5.11" (85mm)
Warranty 3 Years (Direct from Battery Tender)

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Customer Reviews

  • Great for my sea doo
    Review by John P. / (Posted on 5/31/2016)
    Put this battery in my sea-doo - it doesn't get used much and every time someone wanted to take it out the battery was always dead. This battery can easily sit for a month with out being used and it starts every time. A bit pricey but I don't have to jump start it off of my boat anymore!