Feather-Lite Batteries R1245B is the premiere 12v battery on the market. This battery was designed specifically for racers with on board high output alternators. This battery is a 45ah equivlent battery


A great choice for Top Dragster, Top Sportsman, and Bracket racers All levels of Circle track racing.

This battery also preforms second to none on high compression motors that get vapor lock after coming in hot, or bracket racers looking to go several rounds without worries about battery failure. This battery is designed for was designed to work with alternators putting out 150 amps. This battery has staggering cranking amps to start even the toughest engines, and plenty of capacity. If you are looking for the BEST look no further.


SKU: FL-R1245B
  • FL-R1245B is a 12.8V 45ah designed racing battery is the top of the line 12-volt battery on the market. This battery is 2nd to none, simply the best choice for many 12V application on the market, and it was designed to start the hardest engines with cranking amps like nothing else available.

    This is the battery of choice for many of the top racers and simply the best choice for any 12v power source need No matter if your running any drag car upto16+:1 cranking compression, NASCAR, dirt models this is the battery of choice look no further. Do Not be fouled by our batteries small size or Feather-Lite weight, they pack more or a punch with better reliability.


    Made with the safest, highest quality products available and encased in a custom full carbon-fiber case, may not be exact size replacement for what you have, but that’s because we build Feather-Lite batteries to be compact not wasting any space.


    The FL-R1245B weighs in at 2.7 lbs. but compared to the competition this battery offers more cranking amps, more pulse cranking amps, and a lot more capacity. Its small stature brings it in at 4.865” long 4.00” wide 5.56” tall makes it have the smallest footprint of any battery in the same performance category. With 1900 cranking amps (15 seconds) this battery has the fastest engine starting power every single time, you would need 2 of every other battery on the market minimum to match that power and surpass our capacity, some companies you may need 3 or 4 of them.


    We designed and built these batteries from the cell design out, coping nothing on the market, trying to fit into no existing mold, just built the smallest lightest most powerful battery the customers needed and wanted. Feather-Lite Batteries can be mounted in any configuration, orientation, or location, can be wired in parallel or series configurations. Unlike sealed lead acid or AGM batteries the power and performance you get used to at the start, is what you can expect up to the end of the battery’s life cycle. You can also expect 4 times longer life expectancy than batteries of the same power specs in those technologies.


  • Dimensions:

    Length 4.865” (123.6mm)

    Width 4” (101.6mm)

    Height 5.6” (142.2mm)

    Weight: 2.7 LBS (1.22kg)

    Polarity Configuration: Left side Positive


    Battery Energy Specifications:


                   Nominal 12.8

                   Charged 14.4

    Capacity: 45 Ah (Lead acid equivalent/ PbEq)

                    15 Lithium amp hours

                    99 minutes of Reserve Capacity

    Cranking amps: 1900 @ 75 degrees Fahrenheit (for 15 seconds)

                                2470 Pulse Cranking amps


    Recommended Charger: FL-BC125


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