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Power-Sonic AGM General Purpose PS-12550 55Ah 12V Rechargeable Sealed Lead Acid (SLA) Battery - U Terminal

Item #: POWERSONIC-PS-12550-U
Brand: Power-Sonic
Item #: POWERSONIC-PS-12550-U
Brand: Power-Sonic
  • Manufactured by Power-Sonic, the most trusted name in SLA batteries
  • Universal terminal compatible with a wide range of backup power systems
  • Regulation valves and spill-proof construction makes this battery durable and reliable
  • Provides long lasting, consistent energy with absorbent glass mat technology

Power-Sonic PS-12550 SLA Battery

The search for portable power you can trust is over!

Power-Sonic introduces its 12-volt sealed lead acid battery line onto the market. The PS-12550 is a U terminal model, rated for 55AH and an internal resistance of 2.5 milliohms. Ideal for indoor and outdoor use, the PS-12550 is protected by ABS plastic, a hard outer shell built for increased impact resistance. AGM technology inside the battery removes free flowing liquid, excess heat, and increases overall current effectiveness. Ideal for alternative power sources, Power-Sonic sealed lead acid batteries are the preferred choice in portable power options.


  • Chemistry:SLA (Sealed Lead Acid)
  • Case: ABS Plastic
  • Terminal Type: U/T6
  • Nominal Voltage: 12 Volts (6 Cells)
  • Nominal Capacity:
    • 20-Hour (2.75A to 10.5V)......... 55.0 Ah
    • 10-Hour (5.1A to 10.5V)........... 51.0 Ah
    • 5-Hour (8.8A to 10.2V)............. 44.0 Ah
    • 1-Hour (30.6A to 9.0V)............. 30.6 Ah
    • 15-Min. (96.0A to 9.0V)............ 24.0 Ah
  • Energy Density (20-Hour Rate): 1.64 W-h/in³ (100.30 W-h/l)
  • Specific Energy (20-Hour Rate): 17.65 W-h/lb (38.91 W-h/kg)
  • Max Discharge Current (7 Min.): 165.0A
  • Max Short-Duration Discharge Current (10 Sec.): 410.0A
  • Internal Resistance (approx.): 7.0 milliohms
  • Shelf Life (% of nominal capacity at 68°F (20°C)):
    • 1 Month ......... 97%
    • 3 Months ........ 91%
    • 6 Months ........ 83%
  • Operating Temperature Range:
    • Charge: -4°F (-20°C) to 122°F (50°C)
    • Discharge: -40°F (-40°C) to 140°F (60°C)
  • Dimensions (LxWxH): 9.04" x 5.45" x 8.98" (230mm x 138mm x 228mm)
  • Approximate Weight: 36.0 lbs. (16.33 kg)
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