The XS Power D4900 is a sealed AGM battery in the Group 49 (H8) size, designed as a direct-fit upgrade for European and import cars. It delivers high cranking amps and reserve capacity for demanding electrical systems, including car audio. Enthusiasts choose it for its competition-grade power and drop-in fitment, though it costs more than standard AGM batteries.
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Owners praise the D4900 for its reliable power in high-demand audio systems and its drop-in fit in Group 49 applications. Some note that it is heavier and more expensive than standard batteries, but many consider it worth the investment for performance.
The XS Power D4900 is a 12V AGM battery in the Group 49 size, also known as H8. It fits the factory tray in vehicles that use the Group 49 footprint, including BMW, Audi and Mercedes models, so no custom fabrication is needed.
It is a sealed AGM battery built for car audio systems, including high-output daily-driver setups and SPL competition builds. It is rated at 4000 max amps, 1100 CCA and 178 minutes of reserve capacity. M6 hardware is included.
