Backup Battery or what? (Calculator)

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Discussion Overview

The discussion centers around the battery configuration of the SHARP EL-W535X calculator, specifically regarding the presence and purpose of a second battery slot. Participants explore whether this slot is intended for a backup battery and the implications for the calculator's operation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether the second battery slot is for a backup battery and seeks information on what type of battery would fit.
  • Another participant notes that the manual does not mention a backup battery and wonders if both battery slots are utilized, questioning if the calculator can operate with just one battery.
  • A different participant asserts that the calculator is entirely battery powered and suggests that the second slot may be unnecessary, given the long battery life.
  • One participant mentions the possibility of the calculator being solar powered, adding to the confusion about the battery slots.
  • Another participant points out that Sharp has multiple calculators with the same casing but different battery requirements, implying variability in design across models.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the purpose of the second battery slot, with no consensus on whether it is for a backup battery or if it is utilized at all. Multiple competing views remain about the calculator's power source and battery configuration.

Contextual Notes

There is a lack of definitive information in the manual regarding the second battery slot, and assumptions about the calculator's operation with one or both batteries remain unresolved.

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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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