Testing Batteries.
Battery Beak
The battery beak is a device that allows you to quickly test a battery and see if it is good to take and use. The main points to look for on the battery beak are V0 and the internal resistance. The voltage should be over 13 volts and the internal resistance should be under 0.015 ohms(15 milliohms).
Automotive Tester
The automotive tester gives more accurate testing results and more data than the beak. It gives you the voltage and ohms just like the beak, but it also gives the SoH(State of Health), the SoC(State of Charge), and the CCA(Cold Cranking Amps). The SoH and SoC should ideally be 100%, but the SoH will go down over time with use. The CCA should be over 150.

