Hi Astrocat,
Thanks for your thoughts - Next time I heard from the chap, he'd broken off the charger power plug, so got another P/S from the 'Flea'
He didn't care to pay for the replacement battery so was unable to check. There's a thought however, that the P/S input socket is wired to suss non-standard Power supplies, with an additional pin somewhere on a two pin socket. He hasn't yet broken off the socket for me to replace it.
Thought later to have a look inside the battery, said 'Dell', most everywhere on the sub-panel - Surprised it didn't work.
Hate Lap-Tops, Netbooks, and anything by Apple, as can't mend 'em. Have great XP machines about where I just replace the duff bits no problem - Chris.