Topic: Lithium ion Battery in a 1975 CB750 ?

[John G]

What would happen if I ran a Lithium ion battery in my CB with the original electrical setup. I'm looking at a 12.V 20Ah Lithium ion battery.

[M 750K6]

Check the output of the charging system is in the correct range for the battery. Need a different battery tender, that can maintain them.

[bryanj]

The charging system is far too crude for a lithium battery

[John G]

Thanks Bryan, that's what I was thinking. Think I'll just stay with the old liquid acid battery.

[M 750K6]

AGM will be fine.

[bryanj]

Yup, agm ok

[Prospect]

I've run a lithium for 3 years. Zero issues.

Bike starts very well. 1971 CB750. I've also run it on a 1954 Harley panhead. I run an 8 cell

https://fortnine.ca/en/antigravity-small-case-4-cell-lithium-ion-battery-ag-401?utm_id=68826402477&utm_campaign=1768313956&utm_source=google&utm_medium=paid&utm_content=342571824935&gad_source=1&gclid=Cj0KCQiA84CvBhCaARIsAMkAvkJAaEZ6qYJmO67ZWyCEX46PPdiM-izUU_oVSl3tDPRy9DUWmg5ofroaAu2WEALw_wcB

[bryanj]

Having read a lot about the charging system required where lion batteries are frequently used the voltage control of the standard Honda regulator is outside the specs required as it only has 3 settings, off, flat out and approx half charge

[Deltarider]

The voltage spikes the old system brings, won't help much either, I'm afraid.

[MauiK3]

It does seem likely that a lithium battery would work, at least for awhile. The old charging system might cause early failure of the battery, not sure. What would be cool is if someone set up a "minder" brain between the battery and the + terminal to monitor charging and intervene if needed.