<div dir="ltr">I was going to suggest AdaFruit as well, they have been publishing wearable projects almost since the start of the idea of using an Arduino in your shirt. :) <br><br>Pete</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Oct 7, 2020 at 12:31 PM Daniel Roberts <<a href="mailto:danmroberts@gmail.com">danmroberts@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">For a one-off or small quantity project, Adafruit has a lot of small rechargeable batteries, as well as boards to manage charging: <a href="https://www.adafruit.com/category/138" target="_blank">https://www.adafruit.com/category/138</a></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Oct 7, 2020 at 12:46 PM Dan Snazelle <<a href="mailto:subjectivity@hotmail.com" target="_blank">subjectivity@hotmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello <br>
<br>
I am working on a project that is quite small. I would love some advice on which coin or flat batteries are good , small and have a decent output ..I would love to be able to drive leds, a 3.3v uprocessor, maybe a small speaker but of course AA batteries or a 9v are too big for this <br>
<br>
another possibility is a storage battery with a solar cell that continually charges the battery—I have never tried this and once again any advice would be great.<br>
<br>
obviously it’s possible as the Apple Watch has quite a small footprint yet is able to drive a screen and a microprocessor. i suppose a tiny dc to dc converter could help<br>
Too <br>
<br>
I see other examples all over the place I’ve just never been in a position where I needed something very small and instead of going through thousands of entries online I figured I would ask the community first <br>
<br>
<br>
THANKS FOR ANY HELP <br>
<br>
<br>
<br>
<br>
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