12V DC Ammo Can Power Box v1.0


I wanted to build a custom rugged battery box on a budget for amateur radio communications and emergency charging. The ammo can was found in poor condition at an army surplus and was restored by sanding to remove rust, re-painting, and lubricating the rubber seal. I’m not yet satisfied with the internal fabrication and will continue to improve upon its design later. Future improvements to include: led switch, solar charge controller, improved mounting panel, volt/amp meter.

more photos below and materials list below…

Materials used:

  • 1x – .50 cal ammo box
  • 4x – 12v 7.1 ah SLA batteries
  • 1x – led strip
  • 1x – cut up black mouse pad
  • 1x – 1 foot strip of heavy duty velcro
  • 3x – 2″ pieces of aluminum angle  (velcro used on both exterior sides for panel mounting)
  • 1x – SPST 12VDC Lighted Automotive safety switch
  • 1x – Banana plug jack
  • 1x – 12V automotive cigarette lighter fused socket (installed adjacent to banana plug)
  • 1x – Banana plug to Anderson Power Poles adapter
  • 1x – 12V Battery Tender Junior Battery Charger
  • misc wire and connectors…




with misc power connectors and mini-altoids USB charger


led strip illuminated


view of 4 SLA batteries and switch panel


aligning handmade stencil of K2FIQ call sign and description


painting with the stencil


stencil removed


finished product

rough wire diagram

rough wire diagram


tech enthusiast, developer, engineer, scuba instructor, drone pilot, minister, K2FIQ.

Posted in do it yourself, ham radio, radio Tagged with: , , , , , , , , , , ,

That’s actually a plastic bracket that i found in old APC UPS battery backup holding the same size batteries together.

  • admin-photo
  • brandon fiquett
  • tech enthusiast, developer, engineer, scuba instructor, drone pilot, minister, K2FIQ.

subscribe via email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 2 other subscribers