George is right to point to the manual or whatever documentation you have Ian, and there's a fair chance you could find details on line, although not necessarily in an accessable format. I'd say though that if you have to work it out for yourself then you will need a magnifier or a pair of eyes to assertain: 1. Voltage and current requirements. Voltage should be fairly easy as it must be at least the same as the total voltage of the batteries the equipment takes. Current might be indicated in writing near the DC socket, otherwise you have to er a bit on the high side of an estimated current consumption. 2. Polarity. This is VERY important. You have to find out whether the centre pin is positive or negative, and this is where sight could be invaluable. there are some flexible mains power units about which allow of switching polarity either on the power unit, or turning around an adaptor at the end of the lead to match polarity. Maplin do such units. OH yes! There's the size of the socket too. They can vary and there are at least half a dozen different physical dimensions for these. Again, many of the universal power units come with a bundle of adapters. So, if you don't regard yourself as very tech savvy, get some help from someone you trust is up to scratch on these things. From Ray I can be contacted off-list at: mailto:ray-48@xxxxxxxx -----Original Message----- From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx]On Behalf Of George Bell Ian, Do you have the make and model of the main piece of kit? One can often trace what's required by way of power supply from there. George.=20 -----Original Message----- From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx] On Behalf Of Ian Macrae Sent: 10 January 2007 15:49 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] POWERING DEVICES Hello all, Over Christmas the mains power unit to one of my pieces of kit broke when the earth pin snapped off. Sadly, the broken unit has been chucked and I didn't have an opportunity to record its particulars. Is it possible to deduce from the battery power required what I should be looking for in terms of voltage output etc? And what might be the other things I need to ensure are compatible? With thanks. Ian ** To leave the list, click on the immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=unsubscribe] ** If this link doesn't work then send a message to: ** access-uk-request@xxxxxxxxxxxxx ** and in the Subject line type ** unsubscribe ** For other list commands such as vacation mode, click on the ** immediately-following link:- ** [mailto:access-uk-request@xxxxxxxxxxxxx?subject=faq] ** or send a message, to ** access-uk-request@xxxxxxxxxxxxx with the Subject:- faq