Feather-Lite Batteries 1236 is battery was designed specifically for racer looking for a 12v battery that did not need long run times or big capacity. Used in Blown aplications utlizing a crank starter Bracket Racers with carburators, This battery has more than enough cranking amps to start the hardest engine combos.


A great choice for Nostalgia racers, weekend bracket racers along with many Mud and Dirt drag racing classes not using big Nitrous systems.

This battery is designed for TOTAL LOSS systems in mind (racers running with no alternator.) This battery has staggering cranking amps to start even the toughest engines, and run systems with minimum draw, like delay box, auto shifter, shift light, water and fuel pump etc.


SKU: FL-1236
  • FL-1236 is a 12V 36ah is a specifically designed racing battery for the customer looking for the power of a 12-volt battery that does not have the large amperage draws to warrant a larger battery. This battery is 2nd to none, simply the best 12V-volt for applications on the market, that need the extra punch out of a 12-volt battery for starting a hard to start high cranking compression race engine. This battery was designed to start the hardest engines with cranking amps like nothing else available.

    The FL-1236 the battery of choice for many of the top dragsters, Nostalgia, simply because of its small size and Feather-Lite weight. Do Not be fouled by this batteries small size or Feather-Lite weight, they pack more of a punch with better reliability, for the customer not requiring tons of capacity.

    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-1236 weighs in at 4 lbs. but compared to the competition this battery offers more cranking amps, more pulse cranking amps, and the capacity you require not what is only available. Its small stature brings it in at 6.5” long 2.3” wide 5.5” tall makes it have the smallest footprint of any battery in the same performance category. With 1560 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 batteries life cycle. You can also expect a 4 times longer life expectancy than batteries of the same power specs in those technologies.

  • Dimensions:

    Length 6.5” (165.1mm)

    Width 2.3” (58.42mm)

    Height 5.5" (139.7mm)

    Weight: 3.9 LBS (1.59kg)

    Polarity Configuration: Right side Positive


    Battery Energy Specifications:


                   Nominal 13.2

                   Charged 14.4

    Capacity:  36Ah (Lead acid equivalent/ PbEq)

                     12 Lithium amp hours

                     79.2 minutes of Reserve Capacity

    Cranking amps: 1200 Cold Cranking Amps 

                              1560 @ 75 degrees Fahrenheit (for 15 seconds)

                               4680 Pulse Cranking amps


    Recommended Charger: FL-BC1210

    Other Charger options: FL-BC125 (These options are slower charger times)