I have a lovely Logitech DAB radio, with a ****ed battery pack.

It’s got 10 x NiMH AAs, not tagged, but soldered together with wires.

Can I just replace them? Do I need a Thermonuclear sodlering iron to do so?

Soldering batteries is very hard, and possibly dangerous because they don’t like being heated up.

Tagged cells are cheap enough though – why not? If you don’t want to get tagged cells you could perhaps shrink-wrap some together so the ends touch and maybe get some wires in there too.. would also be tricky.

Agreed – you really need a welder to connect to non-tagged batteries. Just get some tagged ones, they’re readily available.

Cool, ta. Usual brands good?

Just don’t buy them from maplin – when I bought a few tagged c nicads they were about £5 each.

Yep, same brands you’d use for untagged (GP, Panasonic, Sanyo). The highest capacity I found with a quick search is here: http://www.strikalite.co.uk/prodcat_type/2/ALL/0/NiMH_Tagged_Rechargeable_Batteries.html

(and as always be wary of high claimed capacities on ebay)

Component Shop
http://www.componentshop.co.uk/12v-2600mah-compact-aa-nimh-battery-pack.html

10*AA @ £14.20

Cheers. It lives plugged in and is only running of batteries occasionally (haven’t counted how often).

Normal NiMHs or memory type ones for longevity?

charge it, use it for a few hours, charge it again, leave it on the side until you know you’re going to want it, or just plug it in once a week.