Group 48 Lithium-Ion Battery

The Braille Performance Intensity Carbon Lithium-ION Battery (i48CX) is an ultra-lightweight, standard-height battery designed as a high-performance upgrade from traditional lead-acid batteries. It is particularly popular among BMW enthusiasts seeking significant weight reduction, shedding up to 35 pounds. Its Group 48 design ensures a direct, drop-in replacement with no required modifications for installation, making it ideal for both track and daily driving. This lithium-ion battery offers superior performance characteristics compared to lead-acid types. It provides a higher, cleaner voltage for improved electrical component performance, quicker starting with less voltage drop, and more stable voltage for engine management and data logging. Its efficient charging (5 times faster than lead-acid) results in less horsepower draw from the alternator. With a lifespan 3-5 times longer, especially in harsh environments, and a failure rate under 1%, it offers greater reliability. Additionally, it holds its charge exceptionally well, capable of sitting for over a year disconnected and still retaining over 13 volts for starting. Physical specifications include a BCI Group size of 48, a weight of 10.5 lbs, and dimensions of 11" L x 6.8" W x 7.7" H. Performance specifications feature a 12V voltage, 13.8V full charge voltage, 1520 Pulse Cranking Amps (PCA), 25 Amp Hours (AH), and a lead-acid equivalent of 75 AH. It boasts an impressive 5000 life cycles at 10% depth of discharge. The battery features brass terminals and a right-side positive polarity. When installing this lithium battery in a BMW that requires battery coding, Braille recommends setting the code to the lowest/smallest AGM battery setting possible. Buyers should confirm their stock battery size and compartment dimensions, as some vehicles may only accommodate a Group 48 due to length constraints, while others can use Group 48 or 49. The product is covered by a Lifetime Replacement Program.