Sunny days…and dead batteries

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Getting some bikes ready to go and they are ready, but their computers are not. How many different size batteries can there be:

  • LR44. Button battery for an old Cat Eye. They aren’t expensive. Amazon has a pack of 10 for $2.43
  • CR1620. This is *not* a CR2016. A cr2032 and a CR2016 are 20mm in diameter and the 2016 is half the thickness. A CR1620 is smaller 16mm diameter. Rakuten has 50 for $5.50!. But I don’t need so many and 25 for $5. Also so cheap at $4 for 5-pack at Amazon.
  • CR123. Just went through an entire 12-pack filling smoke alarms!. $13 at Amazon.

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