I have done some portable radio work but usually around AC power / and generator. I want to do some QRP work either back packing out in my 4x4 or out on the quad. I don't want to risk running the battery down on the 4x4 or the quad, so i decided to build a small battery box. Now this is not an original idea a lot of us have done this before. I got my idea from a buddy who bought a box from POWERWERX and I built mine a lot like theirs but i used a smaller box to be more compact. I started the build with a ammo box from Harbor Freight, on special the cost 3.99. I cut some bracing out of the lid to mount parts that follow. I ordered a volt meter, usb charging port and a 12v power socket from Amazon. This came with a 3 hole face plate and the wiring with fuses. Cost 19.99. I then bought a battery from BIOENNO POWER. The battery is a 12V, 9Ah LFP Battery (PVC, BLF-1209A) cost is 99.99 plus 6.00 shipping. Bioenno Power got the battery to me in two days by UPS. They did a great job of packaging. I also ordered a charger for the battery NOTE these batteries take a special charger cost 19.99. The battery weighs just 2.6 pounds and comes with Anderson Power Poles installed which just so happens that what i use for battery connectors. Box with custom go fast stickers LOL. Hope you like the build.