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The original was posted on /r/nicechips by /u/BinaryTreeSmoker on 2025-10-01 21:22:08+00:00.

I found this one while browsing DigiKey. 1.5V nominal, charging to 1.6V is recommended but it can go to 1.8V if you are willing to increase the cycle lifetime degradation. It seems like it can safely be discharged to 0V. Polarity is applied during the first charging, which has to happen after soldering.

https://www.tdk.com/en/tdknext/solution/cera_charge/index.html

https://www.digikey.com/en/products/detail/epcos-tdk-electronics/B73180A0101M062/11619348