Backup Battery or what? (Calculator)

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SUMMARY

The SHARP EL-W535X calculator features a single primary battery slot, which is designed for a small battery that lasts approximately 3000 hours. Despite the presence of a second battery slot, there is no documentation confirming its use as a backup battery, nor is there any indication in the manual that the calculator operates with both slots filled. The calculator is primarily battery-powered, and while it has solar capabilities, it does not rely on solar power for operation. Users should disregard the second slot unless further information is provided by SHARP.

PREREQUISITES
  • Understanding of battery types and specifications
  • Familiarity with SHARP calculator models
  • Basic knowledge of solar-powered devices
  • Ability to read and interpret user manuals
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  • Research SHARP EL-W535X battery specifications and compatibility
  • Explore the differences between solar-powered and battery-powered calculators
  • Investigate common issues with calculator battery slots
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Calculator enthusiasts, electronics hobbyists, and anyone interested in understanding the battery functionality of the SHARP EL-W535X model.

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http://i.imgur.com/qsZ0PM4.jpg

I opened up the back of the calculator to see what kind of battery I might have to replace eventually, but I didn't expect to see a second battery slot. Is it a backup battery slot? If so, how do I tell what kind of battery fits in there? I checked the manual, nothing in it about it. It's a SHARP EL-W535X
 
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I looked at it's manual here:
http://www.sharpmea.com/cps/rde/xbcr/documents/documents/om/30_cal/elw531-g-h-ha-w535_om_gb.pdf
But did not see it mention a backup battery. Maybe it uses both battery slots? Does the calculator work without having one of them?

Also, I have read that it is solar powered?
 
Last edited by a moderator:
Yellowflash said:
I looked at it's manual here:
http://www.sharpmea.com/cps/rde/xbcr/documents/documents/om/30_cal/elw531-g-h-ha-w535_om_gb.pdf
But did not see it mention a backup battery. Maybe it uses both battery slots? Does the calculator work without having one of them?

Also, I have read that it is solar powered?

Nah it's totally battery powered and it works. It came with only the small one in it and it begs the question why that slot would be in the design in the first place. Seems inefficient and unnecessary considering the battery lasts like 3000 hours and there is no mention of there being a back up battery slot anywhere

also, it might even be a different manual since it has an x on the end of the model #
 
Last edited by a moderator:
I couldn't find anything online either. Maybe just ignore it.
 
Sharp has several calculators that use the same case. They use different batteries. Some use the smaller one, and others the larger.
 

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