Dear Broadbean.
Lets keep things in perspective here my plan was to find an alternative supplier of a specific battery i.e. the Panasonic PLCXB1228AP .This is the current battery used in the AMX-4 mobiles .I agree with a lot of your comments ,and I am technically aware of the situation and of all the consequences of any actions that may alter the spec of equipment .This was not my first intention. But a lot of battery manufactures will supply direct replacements for common batteries for use in medical equipment. With my background in industry i was used to looking at all the possible (safe of course) alternatives .I think if a few others did this then we could save the NHS (Our Taxes) a lot of money!!
The easy way is not always the best ..But it takes less effort I suppose?
Regards
Pete.