B3121 - Lightweight AGM Battery
B3121 - Lightweight AGM Battery
At 21 pounds, the B3121 is our lightest do eveything battery yet. Using our Advanced AGM racing technology we have put a lot of power into a very small package. With 1380 pulse cranking amps this has enough power to start more than any other battery in its weight class. This is the perfect model for those who want to shave half the weight of a standard Group 34 battery and still have enough power to crank over a steet car with V8 engine & standard compression. Used in everything from large Harley Davidsons to Hot Rods, road race cars, Corvettes & Vipers. (Note: while high in cranking amps, make sure battery has enough capacity for the vehicle intended to be used in.  Not designed for big block, high compression motors, those with no alternator, etc. where a full-size battery with high capacity is required.) 

Direct Replacement For:

YIX30L, YB30L-B, ETX30L, HD 66010-97

Common Upgrade For:

PC925 (same size, 5 pounds lighter, 50% more cranking power)


   Physical Specs
BCI Group All Sizes Width 5.2" / 132mm
21lbs / 9.5kg
Height 6.8" / 173mm
6.6" / 168mm
Polarity Right Side Positive


   Performance Specs
Full Voltage Charge  13.2
Pulse Cranking Amps (PCA) 1380 Amp Hour (AH)  31
Reserve Capacity 1hr 15 mins
Life Cycle (10%DOD)  3100

  Related Products