XS Power D3478 Group 34 12V AGM Car Audio Battery
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order, and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 within the contiguous US. Freight items may require delivery coordination; any shipping exceptions are shown before checkout. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
The XS Power D3478 is a no-compromise Group 34 AGM battery built specifically for vehicles running demanding audio systems on a 12V electrical platform. Its sealed absorbent glass mat construction means it can be mounted in virtually any orientation — a critical advantage when you are reclaiming every cubic inch of trunk space for enclosures and amplifier racks. With deep-cycle capability married to a massive cranking figure, it satisfies both the vehicle starter and the audio system without splitting duties between separate batteries in simpler builds.
The AGM Standard for Daily-Driver Builds
For a street car running a big amplifier array alongside a high-output alternator, the D3478 is the kind of high output battery that soaks up the charge and hands it back without sagging. SPL competitors use it as a front battery anchor precisely because its sealed AGM design is safe in the cabin, and daily drivers love that it doubles as a legitimate dual purpose starting battery with impressive reserve capacity.
Specifications
| BCI Group Size | Group 78 |
| Volts | 12v |
| Max Amps | 3300 |
| CA | 1150 |
| CCA | 1012 |
| Ah | 80 |
| RC | 160 |
| Primary Watts | 2500 Watts |
| Secondary Watts | 4000 Watts |
| Polarity | L |
| Included Hardware | M6 Hardware Included |
| Warranty | 3 Year — view warranty (PDF) |
| Instructions | Download instructions (PDF) |
| Length (Inches) | 10.24 |
| Width (Inches) | 6.89 |
| Height (Inches) | 7.16 |
| Weight (lbs) | 49.47 |
| Weight (kg) | 22.67 |
