Question about solar powered calculators

Found 17th Oct 2010
Are there any solar powered calculators that don't have some form of battery? I have seen several that are solar but have 1 battery also - maybe a back up? Thanks

12 Comments

The battery as you stated is merely there for backup when there is a lack of solar power - afaik they all have backup batteries.

I have a credit card sized solar powered calculator which doesn't have a battery, so yes, there are some which don't have a back up battery. Why?

Banned

some have batteries, some dont, some have capacitors that store up a little bit of charge.

Banned

I know the ones at school back in the 90's didn't have back up batteries. Miss mine's not working, look!

Original Poster

want to send them in the christmas shoeboxes but recipients wont have £ to buy batteries so no point sending them if they only work with batteries - if they have a battery but it is not used then it would be ok to send

fairy

want to send them in the christmas shoeboxes but recipients wont have £ … want to send them in the christmas shoeboxes but recipients wont have £ to buy batteries so no point sending them if they only work with batteries - if they have a battery but it is not used then it would be ok to send



That's such a nice idea.

Original Poster

yes but need to get a definitive answer as only a week to go to finalise boxes

Sloth/Mod

You can get hydro powered ones but they aren't cheap - envirogadget.com/off…or/

Original Poster

good aren't they. Too expensive I am afraid - getting 8 boxes together so needs to be a couple of £ max. I am coming to the conclusion that bar the credit card ones that don't really do much they all have a back up battery

Banned

Seen these go to previously well off families who have a BMW in the drive, I'll skip being charitable.

Original Poster

just in case you feel like being charitable I will link you to where my boxes go - it is a legit charity who do really good work. If anyone wants to get in touch please do

youtube.com/wat…C-4

Banned

lumoruk

Seen these go to previously well off families who have a BMW in the … Seen these go to previously well off families who have a BMW in the drive, I'll skip being charitable.



it was an aston martin
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