12V Datalogger for Troubleshooting Charging System

red31 wrote:
The data logger is supplied with a cap featuring a pair of screw terminals and measurement leads terminating in crocodile clips.

Here's a pic of mine. I used larger croc clips so I could attach it to the battery posts. But you can use smaller ones too, that attach to connectors anywhere in your setup, where you'll get continuous battery voltage. I've pulled the cap off, so you can see the USB tab that plugs into your PC.