Here is my Show and Tell from last night's meeting. My Go BOX power supply. It uses 8 -38120 LifePO4 batteries. This thing can start a car. I have it in an ammo box. LifePO4 batteries are favored over Li-ion as 4 LifePO4's in series will provide 12.8-13.2V whereas Wet cells, Gell Cells AMG and? NiCAD, are LOW and Li-ION are too high in range for useful Amateur Purposes. With my battery pack I incorporated a 100AMP Balance Management System (BMS) ... IT monitors battery performance charging and discharging as not to overcharge or undercharge causing premature failure. With a BMS it's easy to meet and exceed 2000 re charges safely... These are the batteries on YOUTUBE that a guy shorts them with a 1/2 inch open end wrench and the wrench turns cherry red.? Pictures are in the Group Photo section- click on the left menu. Full kits on Ebay are $150(no case) to $444..
I can recharge up to 80 amps and discharge to 100 amps. Batteries are rated 8 amp-HOURS. I have a source of theses batteries in Philadelphia at about $11 each shipped.
Final picture is a semi-kit I am offering I bought in excess to get better pricing. I have 2 complete Semi kits left. $30 per kit. If not gone by June 4th, I'll put them on Ebay. Totally built, I have about $110-120 into mine. It floats too in the Plano ammo box.
de Larry W8LM..
Larry Macionski