12v 20ah Power Pack


  • Portable 12 Volt DC
  • Proven safe & reliable Sealed Lead Acid chemistry
  • Military grade waterproof case
  • Completely Customizable
  • No Shipping Restrictions


Over the past 10 years R.T. Clark Co., Inc. has produced over 200,000 portable waterproof battery boxes for the Geophysical Industry that have been used in some of the roughest terrain all over the world.

We are now using our tried-and-true manufacturing expertise to bring these Portable Power Solutions to the general public.

The 12v 20ah Power Pack contains a 20ah (20,000mAh) battery cell that can be used to power many different 12v accessories. The standard model comes with a DC Receptacle, Dual 5v 2amp USB Plugs, Battery ON/OFF Switch, and Voltage Readout display.

All Power Packs are made-to-order to ensure each pack is of the highest quality and freshest battery cell to maintain durability and longevity of your Power Pack. This also allows the ability to customize your order to fit your specific needs, varying from a selection of case colors, labeling and branding on the exterior and interior panel, and different output panel connectors. Let us help with your Portable Power needs.

Assembled in the U.S.A.

Exterior: 12 x 10 x 5in  (30.5 X 25.4 X 12.7cms) MIL-STD810F 512.4, IP67, MSDS Available upon request
Weight: 17.5lbs (7.9kgs) Drop Testing Certification


Battery Specifications

Nominal Voltage 12 volts (6 cells)   Internal Resistance (approx.) 9 milliohms
Nominal Capacity   Max Discharge Current (7 Min.) 60.0 amperes
20-hr. (1.0A to 10.50 volts) 20.0 AH   Max Short-Duration Discharge Current (10 Sec.) 200.0 amperes
10-hr. (2.0A to 10.50 volts) 19.0 AH   Shelf Life (% of nominal capacity at 68°F (20°C))
5-hr. (3.4A to 10.20 volts) 17.0 AH   1 Month 97%
1-hr. (12A to 9.00 volts) 12.0 AH   3 Months 91%
15-min. (35A to 9.00 volts) 8.75 AH   6 Months 83%
Approximate Weight 13.20 lbs. (6.00 kg)   Operating Temperature Range
Energy Density (20-hr. rate) 1.71 W-h/in3 (104.22 W-h/l)   Charge  -4°F (-20°C) to 122°F (50°C)
Specific Energy (20-hr. rate) 18.18 W-h/lb (40.08 W-h/kg)   Discharge  -40°F (-40°C) to 140°F (60°C)