Vault Power batteries are electrical-support components, not substitutes for correct charging, wiring, fusing, grounding, and amplifier planning. SMS Car Audio selects battery support around the vehicle, battery chemistry, amplifier demand, charging behavior, available mounting space, and expected system use.

Exact voltage range, charging current, discharge capability, dimensions, weight, terminal layout, mounting orientation, and charger compatibility must be verified for the exact model before purchase or installation.

Shop Vault Power | Electrical Upgrades | Alternator Planning | Contact SMS

Current Vault Power Battery Families

• Element 11 sodium-ion batteries: Sodium-ion models for automotive, motorcycle, powersports, marine, and custom 12-volt electrical applications when the exact charging and voltage requirements are compatible.
• LI-HD lithium batteries: Motorcycle-focused lithium battery models that require exact Harley-Davidson fitment, charging compatibility, cable, fuse, and mounting verification.

SMS verifies the exact model and does not transfer specifications from one Vault Power battery to another. Capacity alone does not establish current capability, charging limit, or system suitability.

When Additional Battery Support May Be Appropriate

• Large subwoofer-amplifier systems.
• Multiple-amplifier systems with sustained current demand.
• Jeep, motorcycle, powersports, or show builds with substantial lighting and accessory loads.
• Vehicles showing measurable voltage drop, slow recovery, battery discharge, or amplifier-protection events.
• Systems operated for extended periods with the engine off or at low charging output.
• Builds planned for future expansion that require additional reserve and properly sized distribution.

Battery Chemistry and Charging Must Match

Sodium-ion, lithium iron phosphate, AGM, and other battery chemistries do not share identical charging requirements. A battery must be compatible with the vehicle's regulated voltage, intelligent charging strategy, alternator, external charger, battery-management or balancing system, and any other battery connected to the vehicle.

• Confirm the manufacturer's allowable operating and charging voltage range.
• Confirm maximum alternator or charger current for the exact battery.
• Confirm whether active or passive balancing is built into the battery.
• Confirm whether mixed battery chemistries are approved in the proposed layout.
• Confirm start-stop, intelligent battery sensor, registration, and vehicle-programming requirements.

What SMS Reviews

• Vehicle year, make, model, engine, factory battery, and charging-system behavior.
• Amplifier list, published power, estimated current demand, duty cycle, and realistic listening use.
• Battery model, chemistry, capacity, dimensions, weight, terminals, placement, mounting, and service access.
• Power- and ground-cable size, fuse protection, distribution, termination quality, and measured voltage drop.
• Alternator output, idle behavior, charging voltage, regulator strategy, and compatibility with the battery.
• Accessory loads such as lighting, DSP, radios, cameras, air systems, and other electronics.
• Future expansion so the electrical system is not underbuilt.

Capacity and Advertised Wattage Are Not Complete Selection Methods

A battery's amp-hour rating or manufacturer-published wattage-support estimate cannot replace a complete current and charging analysis. Real demand depends on amplifier efficiency, impedance, music duty cycle, operating voltage, play time, alternator output, cable loss, accessory load, and battery state of charge.

Secure Mounting and Fuse Protection

The battery must be mounted securely and protected from movement, impact, conductive objects, water, and heat. Positive conductors require fuse protection appropriate to the cable and available fault current. Exposed terminals and distribution points must be covered and serviceable.

Battery Support Does Not Correct Other System Problems

A battery cannot correct an unsuitable enclosure, clipped source signal, undersized cable, poor ground, incorrect final load, unsafe gain structure, or an alternator that cannot replace the energy used. SMS treats the battery as one component of the complete electrical and audio system.

Products and Support Resources

• Vault Power Batteries
• Batteries and Electrical Products
• Autotech Engineering Alternators
• Amplifiers
• Battery and Electrical Planning
• System Planning

Information Required Before Recommendation

Send SMS the vehicle, engine, amplifier list, subwoofer plan, current battery setup, alternator information, cable size, available mounting space, charging voltage when known, and future system plan. SMS can determine whether the next step is wiring correction, battery support, alternator support, or a complete electrical upgrade.

SMS installs batteries and electrical products supplied through SMS Car Audio and does not accept customer-supplied equipment for installation.

Book Electrical Planning | Contact SMS Car Audio | Call or text 504-289-8127