Source 12V 24V Microcomputer Storage Battery Charger For Car Motorbike Accumulator Tricycle Agriculture Machinery VEHicle 220V 60A on m.alibaba.com
Aibeau Car Battery Charger, 12 A, 12 V / 24 V, Fully Automatic Intelligent Trickle Charger
MCM/70 a Canadian microcomputer from 1973, with one-line gas plasma display and dual cassette drives. Could be rigged for battery power too. (working link now) : r/retrobattlestations
12V 16A Weekly Timer Switch, Built-in 12V 40mA Rechargeable Battery, Microcomputer On Off Control, For Profeesional Use Company - Walmart.com
Source Microcomputer High Frequency Inverter Spot Welding Machine with Pedal Plate For battery welding nickel strip TWSL-2118 on m.alibaba.com
Electronic Timer Switch KG316T-III 220V AC 30A Large Current Microcomputer Intelligent Timer Switch Built-in Battery: Amazon.com: Tools & Home Improvement