Got a good source for safe, reliable battery replacements? Last time I needed one I discovered that Duracell made them, but it seems like they've stopped now.

In the UK, laptopsandspares.com "2-power" batteries have worked well for me. Subtel are pretty good too for UK/EU.

https://www.laptopsandspares.com/pno/cbi3402a.html

https://www.subtel.co.uk/Battery-for-Lenovo-ThinkPad-Edge-14...