Why don't they make phones with built in solar panels like

>>52545806
a phone uses orders of magnitude more power then your calculator

>out of batteries
>using the solar panel
>put your finger over the solar panel
>calculator turns off in 10 seconds

ayyy

http://www.amazon.ca/gp/product/B014ORUV2Q

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>>52545846
>years ago in highschool
>out of batteries
>calculator works ONLY under sunlight or a fairly strong source of light
>all my mates fuck with me and put their hands over the solar panel to delete everything i'm doing

Not a bad idea OP. Put a panel on the back of the phone, if just to supplement the battery life or charge it in emergency situations. Additional cost would be marginal.

>>52545806
power draw
on the other hand, maybe e-ink readers could increase their battery life with solar panels on the bezels
it would be awesome to have e-ink reader that doesn't need to be charged if you're reading outside a lot

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>>52545806
Samsung's done it -- didn't pick up

The amount of time it would be exposed to direct sunlight is minuscule so most phone companies don't bother. There are cases for phones I believe, but honestly it's better just to keep a small unfolding solar panel and a battery bank in your backpack or something because the collection area on something the size of a phone would charge it extremely slowly.

>>52545961
Mobile phone with e-ink would look great, but it would last for months so you might forget to charge it when it suddenly turns of.

>>52545897

Top kek.

>>52545961
they already only need to be charged every other week. no need to improve if you ask me.

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Why don't vendors give supplementary lemons for power?

>>52545806
not enough sunlight

too many casios were made in the 80s and 90s and that led to a global sunlight crisis