So the price was OK, the shipping free, and the delivery was excellent - the battery arrived the very next day. It's on charge now - and will probably work once charged, BUT - it's not what I thought I was ordering! I believe this battery, to be second-hand, well used already and NOT NEW as advertised. Here's why I think this....
1. It does not arrive in any official packaging, such as a marked blister pack, It just comes in a small plastic zip bag.
2. There are scratch marks on the three battery terminals where it makes contact in the phone - normal for a battery that's been fitted & used before.
3. There is a small dent in the battery casing.
4. The paper wrapping is coming off, at the point where you'd use a fingernail to take it out of a phone.
5. The battery is generally dirtier and scruffier than the old battery I removed from my phone.
It arrived totally flat (not necessarily a problem) so at first, the phone will not work. It's on charge right now - let's see if accepts a full charge. I measured the voltage across the three terminals; absolutely zero. Whereas the voltage of the battery on the one I took out (fully charged) was 3.83v and 4.12v across terminals 1 to 2, and 1 to 3 respectively.
OK - so it will probably work once it's charged. It will serve as a spare. BUT THIS IS NOT WHAT I WANTED. I want a brand new battery, to give me the maximum performance and duration these older Nokia phones are capable of. Used batteries are a gamble - you may get a good one, or you may get a poor one which is no better than the one you want to replace. These batteries are advertised as "NEW", but I dispute that. They should listed as "used" - and perhaps, "fully tested by us" - if known to be good ones. I will submit these words to Amazon now, as I do not believe these batteries should be advertised as new items.