Defective (more or less) on arrival

No gaming consoles and no phone for repair this time. Not even a stupid car starter battery asking for being replaced at the worst possible moment.

No, this time it is just a very cheap and more or less new "weather station": thermometer (in/out), hygrometer(in/out), barometer, clock/calendar (and lunar phase). It came in a condition that I would call defective. Sending it back was not a good option though: The display is very weak unless the alkaline batteries are next to 100% full. Two or three weeks after inserting brand new batteries the display became increasingly hard to read – I had to use awkward poses from the side to really see the values. If I sent it back, they would probably have inserted new batteries, looked at the display and said: "Customer needs glasses; everything is fine. No warranty case."
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Since the thing was really cheap, it wasn't worth the hassle of writing an essay, possibly paying shipping costs back and forth and hoping for the best (a replacement working better and not having the same issue).

I hear my father saying: "Throw it away and buy another one."
I see some wisenheimer write useless stereotyped "You get what you pay for!"-phrases.

What I say is: The display works with 3.1V, so it will get 3.1V – from some even cheaper step-up module (€1.20). This lets me use bigger, rechargeable batteries anyway.
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What could cause this problem? Shouldn't the device include a voltage converter keeping voltage for the display constant over the battery lifetime? Or are those cheap displays normally more lenient with input voltage range and mine is either defective or simply bad? Anybody got an idea why it works with 3.1V to 3.0V and starts fading below 2.9V (a point where two alkaline cells together are still in the prime of their youth).
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Nice workaround! hahaha. :rofl2:

You should be right though, even these cheap things should have at least some type of regulator to keep working longer than 2 weeks! How much can those things really cost??? 0.02 cents or something??? But maybe your unit is indeed "defective" and that regulator is not behaving correctly.

I have a bunch of those step-up modules too, hahaha. I forgot the specs...but you might even be able to power the thing with just a single AAA battery. Not sure how long that would last though. ^_^
 
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When I mod things I tend to mod them to the extreme had I been in the same situation I probably would have used a 18650, added a charging circuit and stepped down the voltage slightly and shouted " now dim you plastic bastard" or just had it powered via USB as I probably wouldn't have moved it around a lot.

I have to say tho I'm not sure if these are defective or just poorly designed and manufactured, I've been after a cheap weather station forever now and all of the ones in my ballpark seem to suffer in exactly the same way after reading reviews and such - one of these days ill actually get around to buying one
 
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@Archerite The step-up module needs min. 2V input: Shop link and data sheet (it is in English despite saying "Datenblatt" at the top).

@Uiaad Nice idea with a 18650 or just a power adapter. Might consider this at a later point.

It is probably not a final installation with the ugly huge wires anyway. If this consistently works I will make it a little prettier. For now it does what it should on my bedside table.
 
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