Nostalgia | South Orange Salvage

Battery tester SG meter

by PaulLewis | Mar 6, 2014 | Collectibles, Decorative, Esoterica, Industrial, Nostalgia

Back in the day, they made industrial batteries in these big open glass vats. This thing would hang over the side (in the acid) and depending on where the balls were floating, tell you when to charge the battery or run for your life. I mounted them on wood so you can...