Installed Battery Tender quick disconnect /w usb - does your CB make this noise?

[max]

Curious little sound?

Instead of getting into meters and measuring current draw and voltage drops; I’d suggest a simpler approach.

Disconnect the negative lead of the battery tender device (leave the positive on).
Turn on, do you still have the sound?
If No; it’s the battery tender device or negative connection*
If Yes; disconnect the positive lead of the battery tender device, and check again.

As max mentioned; make sure the bike cables are the first to contact the battery posts, then the tender leads (ie, tender lead goes through the battery bolt first, then the bike cable).

This is ambiguous to me. Do you mean that the bike cables should be next to the top of the battery or that the tender lead should be next to the top of the battery?

This is ambiguous to me. Do you mean that the bike cables should be next to the top of the battery or that the tender lead should be next to the top of the battery?
Good question Cormanus, the reason i mention no2 is because lordwasr said;

" this is how I connected the battery tender cables. So the "o ring" parts art on the bottom then the actual battery "+ , - " metal parts sit on top and then the screws . I accidently made a small spark too lol."

So i was not sure which order he had connected the tender cables and it is not immediately clear to the average rider that it is important to get the connections in the right order and clean the surfaces of the contacts ( not with sandpaper but a clean cloth, look under a microscope how you reduce the contact surface area contact and electro plating with sandpaper ).

It looks right and with most connections where not much current flows it is, but with upwards of 300 amps initially and dropping back to 130 amps when the engine is spinning this becomes an issue and is the reason the motor starter cables are so much thicker than the other wiring, there have even been problems on some model bikes where the designers got the cable size and connection point not correct and over time the owners end up replacing and re-connecting the starter cables.

Tucked away under the tool bucket and forgotten this may lead to a problem over time and strike far away from home.
We were just lucky lordwasr gave such a detailed description of the connection or we would have missed it.

At the same time it is nice to see he is having the prescribed amount of fun with his machine and tells us about it;
good on him.( Aussie speak )

.