Chipolo card
Description
Chipolo card has non-replaceable battery. Instead of replacing/renewing it every year, I replaced the battery with two button cell batteries. The size changed from 68x37x2.15mm to 72x31x3mm. You'll need: - Old Chipolo card. - Two CR2016 batteries. - Battery spot welder (there are many ~$15 welders on Aliexpress if you don't have one). These two batteries should give you approximately the same life as the original non-replaceable battery (180mAh). Piezo disc orientation matters -- make sure two contacts are placed on the outer part of the disc and the scratched surface of the inner part. You can use hot glue to fix everything together.
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