Description
Why this model: A 3-inch-wide case with the manufacturer's 30C cell rating makes the NA-18HP a different choice from the NA-20 and NA-30. Do not decide from Ah or wattage alone; check width, secure mounting and accepted charge current.
Compare Vault model specifications · Ask SMS about fit or availability
Compact packaging. High-discharge sodium-ion performance. The Vault Power Element 11 NA-18HP is a 12V, 18Ah sodium-ion battery with a higher-discharge 30C cell rating. It is aimed at space-constrained electrical upgrades where physical fit and current delivery matter as much as amp-hour capacity.
Key specifications
- Model: NA-18HP • Element 11
- Chemistry: sodium-ion • nominal voltage: 12V
- Capacity: 18Ah • 216Wh nominal energy
- Manufacturer vehicle-audio rating: up to 5,500W (application guidance, not a continuous-output guarantee)
- Higher-discharge cell rating: 30C (manufacturer supplied)
- Published charge rating: 72A • discharge rating: 270A
- Maximum voltage marking: 15.8V
- Dimensions (L × W × H): 7.13 × 3 × 6.69 in
- Weight: 6.6 lb
Fit and installation
The narrow 3-inch footprint can help where a conventional battery case will not fit. Confirm available mounting clearance, terminal arrangement, polarity, fuse protection, the charging profile and vehicle electrical demand before purchase. The 5,500W figure is Vault Power's system application rating—not an assertion of continuous discharge at that output. Battery capacity is not a substitute for adequate alternator or stator output.
Available through SMS Car Audio, Marrero, Louisiana. Contact us to match the battery to the charging system, amplifier load and required mounting configuration.
Where this fits in the build
Vehicle-specific and open-air equipment should be chosen around fitment, environment, placement and the output needed where the system will actually be used.