XS Power D4900 - D Series 4000 Max Amps Deep Cycle 12-Volt AGM Battery
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What's Inside?
- • (1) XS Power battery
- • (2) M6 x 16 mm hex-head screws
- • (2) Lock-washers
- • (2) Flat-washers
- • (2) Warranty card
- • Owner's Manual
Extreme Power for High-Performance Vehicles
The XS Power D4900 AGM battery delivers unmatched cranking power and a massive energy reserve for all your vehicle’s needs. Its durable design ensures long-lasting performance in demanding conditions. Perfect for high-performance domestic and European vehicles like Land Rover, Audi, and GMC, it also replaces battery group size H8.
Reliable Power, Safe Performance
The XS Power D4900 AGM battery delivers consistent, dependable power for your car and all its electronics, including high-performance audio systems. Its sealed AGM design protects against spills and moisture, keeping your vehicle safe. Built to handle rough rides, it ensures reliable performance in any driving condition.
Powerful Starts, Maximum Reserve
The XS Power D4900 delivers 1,100 cranking amps for fast, reliable engine starts in extreme hot or cold conditions. It serves perfectly as your vehicle’s main battery, providing steady, dependable power. When used as a secondary battery, it can support high-demand audio systems and accessories up to 4,000 watts.
Frequently Asked Questions (FAQ)
- • Why does the D4900 seem too large even when the battery group number matches?
The D4900 is a Group 49/H8 battery, but real-world fitment can still be tight. One Lincoln MKZ owner had to trim the rear of the factory battery tray because the D4900 was larger than the original battery.
- • Can the D4900 fit a vehicle that originally uses a smaller H7 battery?
In some vehicles, yes, but a spacer or tray modification may be necessary. Ram owners reported that removing a plastic spacer allowed an H8-sized D4900 to drop into the factory location, although the original battery blanket no longer fit properly.
- • Why did my D4900 installation become difficult in a BMW?
One verified D4900 customer specifically said installation would have been easy if it weren't for installing it in a BMW. This suggests that vehicle-specific clearance and mounting arrangements can create more work even when the battery itself is the correct general size.
- • Can the D4900 still allow voltage to fall during heavy bass?
Yes. One real-world audio user reported having a D4900 but still experiencing amplifier clipping at only around 40% volume. This shows that a high-output AGM battery cannot necessarily prevent voltage problems when the amplifier demand exceeds the overall charging and battery capacity.
- • Does the D4900 actually improve the vehicle's electrical performance?
Several owners say it does. A D4900 customer with a 2022 F-150 reported that the battery noticeably improved the vehicle's electrical system, while another owner said charging remained steady around 14V compared with the factory battery.
- • Can the D4900 handle a large car-audio amplifier without another auxiliary battery?
Some users have had excellent results. One verified owner reported powering two 12-inch subs from a 3,200W amplifier using the D4900 together with the starting battery, stock alternator, and Big 3 wiring, with no noticeable headlight dimming.
- • Why is my vehicle showing strange battery or IBS voltage readings after installing a D4900?
Modern vehicles can monitor battery voltage through an intelligent battery sensor, and an unusual reading may not necessarily mean the D4900 itself is defective. One Ram owner using a D4900 reported 14V through OBD but much lower IBS readings, followed by battery-saver behavior and an unexpected shutdown; forum members suggested checking battery and ground connections for voltage drop.
- • Do I need special terminal adapters for the D4900?
Possibly. The D4900 uses XS Power's threaded terminal system, and Crutchfield specifically notes that the battery does not include conventional battery terminals, meaning the appropriate adapters may need to be purchased separately to match the vehicle's power-ring cables.
- • Can the D4900 solve headlight dimming by itself?
It can significantly improve voltage stability, but results depend on the entire electrical system. A verified customer running a 3,200W system reported no dimming after installing the D4900, while another owner still experienced clipping with a demanding setup.
- • Is the D4900 a good choice when the vehicle has lots of electronic accessories?
That is one of the applications the D4900 is designed to address. XS Power describes the Group 49 battery as suitable for larger vehicles and systems with substantial electronic demands, and owners have reported improvements in trucks and other electronically equipped vehicles.
Features:
- The XS Power D4900 AGM battery delivers extreme cranking power, a large energy reserve, and exceptional durability. It’s ideal for high-performance domestic and European vehicles, including Land Rover, Audi, and GMC, and replaces battery group size H8.
- The D4900 AGM battery provides reliable power for your car and all its electronics, including aftermarket audio systems. Its sealed AGM design ensures safety from spills and moisture, even on rough rides.
- The D4900 delivers 1,100 cranking amps for reliable engine starts in extreme temperatures and can serve as your vehicle’s main battery. With ample reserve power, it can support audio systems up to 4,000 watts when used as a secondary battery.
Specifications:
- 12-Volt AGM Battery
- Group 49
- Max Amps: 4,000
- Cold Cranking Amps: 1,100
- Reserve Capacity: 178 minutes
- BCI Group Size: Group 49
- Volts: 12v
- Max Amps: 4000
- CA: 1250
- CCA: 1100
- Ah: 100
- RC: 178
- Primary Watts: 3000 Watts
- Secondary Watts: 4000 Watts
- Polarity: R
Dimensions:
- Length (Inches): 13.9
- Width (Inches): 6.93
- Height (Inches): 7.48
- UPC: 692209050858
- Weight: 63.8
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.
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Totally impressed with this battery. Will recommend it to anyone needing a secondary power source.
