After much searching I’ve come to the following conclusions :-
1. spare batteries for the gen 1 46mm do not exist anywhere.
2. spare batteries for the gen 2 41mm also do not exist anywhere. - it does - just got mine now from ali-express
https://www.aliexpress.com/item/400...o.order_list.order_list_main.5.1f5218025g4bBq
3. spare batteries for the gen 2 45mm are plentiful on eBay and AliExpress. Code is
GB-S10-432830-020H
4. spare batteries for the gen 3 no longer available. Used to be on AliExpress code
1ICP5/25/26
if anyone can prove me wrong and know a source I will be very glad to know,
Tag seem to want special non standard batteries just for them which makes longevity futile.
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