Sorry if this has been posted before but I just felt I should share it.
I searched a while back for these in vain but now I've found them.
http://uk.farnell.com/varta/v6hr/bat...questid=220960
Varta V6HR replacement batteries for 95p !!!!
iPAQ Repair wants £24.95.
Backup Battery (hx4700 / hx4705) :: iPAQ Parts and iPAQ Repairs
Am I missing something :)