multimeter and battery ebike 36V 11,5 Ah

[barbe]

Please!
I tried to discover the real voltage of this 36V battery with my multimeter, but d0esn't work well, I changed the 9V battery in the multimeter but still doesn't work!
Where do I do an error?

 

[indianajo]

Some batteries don't give voltage out the charging socket. So you have to unplug or remove them to access the run socket. Some batteries have a computer that won't let voltage out until the battery computer has talked to the controller computer.
You can check your meter with a fresh D or AA battery, 1.5 to 1.53 v on 2 vdc scale. You can also put it on 250 vac scale, put probes in wall socket and read the wall voltage for your area. 240-250 in SWI. Don't touch probe metal when checking 240 vac.

 

[barbe]

thanks! Now the battery computer has talked to the controller computer and that works! My 36V battery shows 41,7V, that's good.