51913-FS AGM Power Sports Battery

Part Number

The Power Sonic 51913-FS is an AGM battery that is compatible with many BMW motorcycles and few other European bikes. The 51913-FS features a spill-proof and leak proof design and will meet or exceed the specifications of the factory / original equipment installed battery.


  • Factory Activated - Ready to Install
  • Meets OEM Specifications and Fitment
  • Vibration Resistant
  • Sealed - Maintenance Free Design
  • Spill & Leak Proof
  • AGM (Absorbed Glass Mat) Technology
  • Includes Terminal Hardware
  • Includes Installation / Maintenance Instructions

What's Included?

  • New Terminal Hardware
  • Installation / Maintenance Instructions


The 51913-FS is a "Factory Activated" battery. This means the 51913-FS ships pre-filled, with electrolyte, and is charged directly from the manufacturer. When you receive this battery there is no additional steps required - simply install the battery in your vehicle and that's it!

More Information
Part Number 51913-FS
Battery Voltage 12 Volt
Cold Cranking Amps 170 CCA
Amp Hour Rate 19 Ah
Battery Type Sealed Maintenance Free
Battery Chemsitry AGM (Absorbed Glass Mat)
Includes Acid Pack Factory Activated
Acid Volume N/A
Charge Current 1.9 Amps
Dimensions Length: 7-7/16" / 186mm
Width: 3-1/4" / 82mm
Height: 6-7/8" / 171mm
Battery Length 7-7/16"
Battery Width 3-1/4"
Battery Height 6-7/8"

This battery will replace the following manufacturer part numbers:

Battery Upgrade

This battery is an upgrade for the following battery size(s):

Warranty 6 Months
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Off-Season Storage Recommendations

While storing your power sports vehicle recommend the following:

  1. Store your battery in a cool, dry place. (Heat causes your battery to discharge at a faster rate.)
  2. Never allow your battery to remain in a discharged condition for a long period of time. When your battery is to be stored, it should first be fully charged. Recharge your battery approximately once every two months, or when the specific gravity of the electrolyte drops to 1.225.
  3. Do not overcharge your battery. This will cause damage to the cell plates. When charging your battery, feel the sides of the battery container from time to time. When the battery is warm, is has an adequate charge. The specific gravity of a fully charged battery is 1.265.
  4. Never allow the battery to freeze.
  5. As a battery gives off flammable hydrogen gasses when it is charging, never bring an open flame near a battery. Always charge your battery in a well-ventilated area.

To extend the life of your battery we recommend using a battery maintainer. A battery maintainer will safely keep the battery fully charged while in off-season long term storage.