I don't see the reason for using the chassis unless testing the earth, but
you don't need a charger for that!

I actually built a charger many moons back and believe me its better on the
battery.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Bertie Doe" wrote in message
...
The boss in local battery centre says it's ok to connect neg charger lead
to neg terminal on battery.

However, car's user manual suggests connecting to somewhere on the
chassis. This can be a pain, getting a good connection. Any thoughts TIA.