Battery drain.

[Archerfish]

Clutter? What are you talking about?

"In-vehicle" means that the tester is used with the battery still installed/connected to the vehicle. It checks the overall battery condition, like internal resistance, cold cranking Amps (CCA), etc., and gives a report on the state of health (SOH) and state of charge (SOC) of the battery (0-100%) along with other information. The same tool is also used to check the charging system of the vehicle (with instructions to raise the engine RPM to a certain speed while it does its measurements). With that, it also provides the ripple voltage (indicates how well the voltage from the alternator is regulated and filtered), etc.

The measurements below is from my 3 y/o Innova Diesel.





Using a multimeter alone is not the right tool for the job. Voltage measurements does not reflect what is happening inside the battery or your charging system at a granular or detailed level. A "dead" battery could exhibit 12+V open circuit with a multimeter. But as soon as you connect it to a load and current starts flowing, internal resistance comes into play and will then cause the battery voltage to drop below usable levels.

Clutter

I'm referring to the ones plugged in the cigarette lighter. I thought you were talking about that one, my mistake. In that case, regarding the multimeter, I might just leave that at home and buy the one that you posted.

I thought​ I can get away with that multimeter. That means​ it will be inside the cabinet for most of the time...