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What is that battery? It looks like it will last about ten years, wouldn't a solar keyboard need a battery about 1/50th the size?
by stavros 4mo ago
What is that battery? It looks like it will last about ten years, wouldn't a solar keyboard need a battery about 1/50th the size?
- aconbere 4mo agoThat's a 10440 lithium ion cell. It's the size of a AAA battery. Probably bigger than the keyboard needs but they are cheap, standardized, and easy to source.
- cjshearer 4mo agoTo answer the battery life question, I estimate (https://github.com/cjshearer/cweep/issues/2 https://github.com/cjshearer/cweep/issues/2) it will last ~228 days without the solar charger, and between between ~261 and ~337 days with the solar charger. I acknowledge that that really isn't much of an improvement, so at this point the solar charger mostly exists "because it's cool".
- stavros 4mo agoAh, that's too bad. Given how little energy this keyboard consumes, I was hoping it could run on the solar charger indefinitely. Hell, maybe a supercapacitor could be enough, hm. EDIT: I think you've overestimated active power consumption, I don't know if you'd actively be holding down keys for 2.5 hours per day... Also you estimated using this for 11 hours a day straight, which seems like way too much.