HP Forums

Hello!


I have an HP10S.
Well, my doubt is if it works with sun light, because when I put my finger over cell light and cover it all, it does no take any effect.

Does its internal battery work as a back up?


Carlos (BR)
Time zone: GMT -3

(10-13-2020 12:59 PM)CMarangon Wrote: [ -> ]Hello!

I have an HP10S.
Well, my doubt is if it works with sun light, because when I put my finger over cell light and cover it all, it does no take any effect.

Does its internal battery work as a back up?


Carlos (BR)
Time zone: GMT -3

Ah, the HP 10s+ (not 10S). Yes, the battery takes over if there's not enough light for the solar panel to produce enough energy to run the calculator.

Congratulations on your acquisition of a Casio in (very thin) disguise.

It almost certainly is a dual-power machine, i.e. both a solar cell and battery. It looks nearly identical to the Casio fx-300MS, which has the same power supply system.

(10-13-2020 01:27 PM)Dave Britten Wrote: [ -> ]It looks nearly identical to the Casio fx-300MS, which has the same power supply system.

It probably *IS* a Casio fx-300MS...

Hello!

According to the manual (https://www.google.com/url?sa=t&rct=j&q=...YD6VFifdkC) it uses a lithium battery of type LR44 as a backup when there is not enough light to power it.

If it goes out when the solar cell is covered (as in the initial posting) that battery is either discharged or missing.

Regards
Max

(10-13-2020 01:31 PM)Maximilian Hohmann Wrote: [ -> ]it uses a lithium battery of type LR44 as a backup when there is not enough light to power it.

Huh? The LR44 is an alkaline battery.

The OP says that the calculator does not go out when covering the solar panel, which leads him to believe that there's a battery picking up the slack when needed.

Hello!

(10-13-2020 01:39 PM)grsbanks Wrote: [ -> ]Huh? The LR44 is an alkaline battery.

You are right of course. I was caught by someone else's mistake ;-) as the first Google result I got for "LR44" was this: https://www.welectron.com/Varta-LR44-Lit...15V-125mAh

(10-13-2020 01:47 PM)Maximilian Hohmann Wrote: [ -> ]I was caught by someone else's mistake ;-) as the first Google result I got for "LR44" was this: https://www.welectron.com/Varta-LR44-Lit...15V-125mAh

LOL It even says "ALKALINE" on the packaging of the battery!

Indeed its name is HP10s+.

I was sure it was an original HP. Now I dont know.
It seems that the Asgards, from Stargate SG1, made such a perfect copy.:-)

Serial:9CJ6470440

(10-13-2020 01:28 PM)grsbanks Wrote: [ -> ]

(10-13-2020 01:27 PM)Dave Britten Wrote: [ -> ]It looks nearly identical to the Casio fx-300MS, which has the same power supply system.

It probably *IS* a Casio fx-300MS...

Hello!

Please see post #9 of this thread.

Kind regards,

Carlos (BR)

(10-13-2020 01:25 PM)grsbanks Wrote: [ -> ]

(10-13-2020 12:59 PM)CMarangon Wrote: [ -> ]Hello!

I have an HP10S.
Well, my doubt is if it works with sun light, because when I put my finger over cell light and cover it all, it does no take any effect.

Does its internal battery work as a back up?


Carlos (BR)
Time zone: GMT -3

Ah, the HP 10s+ (not 10S). Yes, the battery takes over if there's not enough light for the solar panel to produce enough energy to run the calculator.

Congratulations on your acquisition of a Casio in (very thin) disguise.