Yes they can. Just put a Digital MultiMeter(DMM) across the jump terminals, or the red lead of the DMM on the positive jump terminal and the black lead on a known good ground and measure the voltage. 12.6V is 100% charged, 12.45V is 75% charged, 12.3V is 25% charged, and 12V and under is considered dead, although it should probably start your vehicle. Weird, I know, but that is how Honda of North America taught me going through their university, so that's what I pass along. I figure if Honda don't know, nobody does. Please remember also, this is a general test. To have your battery correctly checked it must be done with a battery tester that induces a load on the battery at the time it is checked. Please get back to us with what you find out.
Thursday, September 19th, 2019 AT 4:50 PM