ST-350 American Bass Audio Stealth 350 | 35Ah AGM Battery | Maintenance-Free, Sealed Power for Car Audio & More

Stealth 350 35Ah 12V AGM Battery for 900W Car Audio Systems

SKU: ST-350

Up To 900 Watt Amplifiers

12V AGM Battery, 35 AH

Stealth 350 — 35Ah AGM Car Audio Battery for Mid-Range Systems

The Stealth 350 is the mid-range workhorse of the Stealth Energy lineup by American Bass. With 35 amp-hours of capacity and support for amplifier setups up to 900 watts, this sealed AGM battery hits the balance point that most car audio builds actually need — enough reserve power to eliminate voltage sag and keep your amplifiers performing at their best, in a package that's still compact enough for flexible mounting.

Built with Absorbed Glass Mat technology inside a fully sealed, maintenance-free ABS enclosure, the ST-350 delivers clean, stable 12-volt power with no risk of spills, leaks, or acid corrosion. A 525A max discharge current (5-second burst) and low 11mΩ internal resistance mean fast, efficient power delivery right when your system demands it — on transient bass hits, sustained low notes, and everything in between.

Why Choose the Stealth 350?

The ST-350 is the most versatile battery in the Stealth Energy range. It's large enough to serve as the sole dedicated audio battery for a single high-powered amplifier or a modest two-amp setup, yet at 24.7 lbs and a 7.68" × 5.12" × 6.57" footprint, it's still easy to fit into trunks, behind seats, or alongside custom enclosures. If you've outgrown a basic setup but aren't ready for a full 55Ah or 75Ah build, the Stealth 350 is the smart next step.

NOMINAL VOLTAGE	12V
NOMINAL CAPACITY(20HR)	35.0AH
APPROX WEIGHT	Approx 11.2 kg (24.7 lbs)
TERMINAL	T6
CONTAINER MATERIAL	ABS
MAX. DISCHARGE CURRENT	525A (5s)
INTERNAL RESISTANCE APPROX	Approx 11mΩ
NOMINAL OPERATING TEMP. RANGE	25+3 C (77+5 F )
DIMENSION	Length: 195+2mm (7.68 inches) Width: 130+2mm (5.12 inches) Container Height: 164+2mm (6.46 inches) Total Height (with Terminal): 167+2mm (6.57 inches)
RATED CAPACITY	35.0 AH/1.75A: (20hr ,1.80V/cell,25 C/77 F) 32.6 AH/3.26A: (10hr ,1.80V/cell,25 C/77 F) 29.7 AH/5.95A: (5hr ,1.75V/cell,25 C/77 F) 26.8 AH/8.93A: (3hr ,1.75V/cell,25 C/77 F) 22.0 AH/22.0A: (1hr ,1.60V/cell,25 C/77 F)
CAPACITY AFFECTED BY TEMPERATURE	40 C (104 F): 103% 25 C (77 F): 100% 0 C (32 F): 86%
OPERATING TEMP.RANGE	Discharge: -15~50 C (5~122 F) Charge: 0~40 C (32~104 F) Storage: -15~40 C (5~104 F)
CYCLE USE	Initial Charging Current less than 10.5A. Voltage 0 0 0 14.4V~15.0V at 25 C(77 F)Temp. Coefficient -30mV/ C
STANDBY USE	No limit on Initial Charging Current Voltage 13.5V~13.8V at 25 C(77 F)Temp. Coefficient -20mV/ C
SELF DISCHARGE	Batteries may be stored for up to 6 months at 25 C(77 F) and then a freshening charge is required. For higher temperatures, the time interval will be shorter.

Support

• Specification Sheet (PDF)