Review on 🚗 AINOPE Car Charger Adapter: Dual QC3.0 Ports, 6A/36W Fast USB Car Charger with Voltage Display - Compatible with iPhone 11/11 Pro/XR/X/XS/8, Galaxy Note 8/S9/S10+/S8-Black by Pranav Osman

I bought this primarily to monitor the charging system on my 1970 F100. I wanted to run a cable through the firewall to the voltage sensor that I needed to install. Then I found this and it just fits in the cigarette lighter. Bonus. I will be able to charge my phone (haven't tried yet). It shows a slightly low value. The multimeter on the battery reads about 14.2 and this reads 14.0, but that's not surprising as some voltage drop is to be expected. the time for the juice to flow through the wiring harness to the fuse box and then to the cigarette lighter port.