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The FL-1690 is the premiere 16v battery on the market, designed for TOTAL LOSS systems in mind (racers running with no alternator.) Specifically, for those with EFI Systems & 5-6 stages of nitrous, Also the perfect option for those switching over to coil over plug systems such as MSD CDI Units.

This Battery is the choice of the top teams in NHRA Pro Stock, and Pro-Mod. This unit was designed specifically for their needs, offering more capacity and MORE CRANKING AMPS than any battery on the market, hear the diffence when you hit the starter. Has been tracked tested repeatedly and been onboard one of the most winning cars in the 2018,2019, and 2021 NHRA & PDRA season.


A great choice for Pro Stock, Mountain Motor Pro Stock, Pro Nitrous, Top Dragster, Top Sportsman, and Bracket racers alike. This battery also performs second to none in huge cubic inch nitrous gulping motors, or bracket racers looking to go several rounds without worries about battery failure. 


For those wanting to run an alternator please check out our units with FLP circuitry protection like the FL-1660PC & the FL1690PC. These units where specifically designed to work with race series alternators. 

FL-1690 (16v 90AH)

SKU: FL-1690
  • The FL-1690 is a 16V 90ah battery that is 2nd to none!! We designed & built these batteries in house from cell design to our custom molded carbon fiber cases. Made W/ the safest, highest quality materials available. Do not be fooled by our batteries small size or feather-Lite weight. It is simply the BEST 16v on the market for high compression race engines!

    - Can be mounted in any configuration/Orientation

    - Can be wired in parallel or series configurations

    -4x Longer life expectancy

  • Dimensions:

    Length: 6.450” (152.4mm)

    Width: 5.3450” (137.16mm)

    Height: 5.75” (139.7mm)

    Weight: 8.8LBS (


    Polarity Configuration: Left side Positive


    Battery Energy Specifications:


                   Nominal: 16.5

                   Charged: 18.3

    Capacity:  90 Ah (Lead acid equivalent/ PbEq)

                     30 Lithium amp hours

                    194 minutes of Reserve Capacity

    Cranking amps:   1875 CCA @ 32°F for 15 seconds

                                 2350 CA @ 75°F (for 15 seconds)

                                 6950 Pulse Cranking amps (PCA)

    ***Recommended Charger: FL-BC1625***

    Other Charger options: FL-BC1615, or FL-BC165 (These options are slower charger times) or when paired with an alternator.

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