Figured out the battery was probably not working. It is not clear how to get to the battery. After looking up a YouTube video, you have to take out the two tiny screws which means you need a very special small philips screwdriver which I happened to have.Then you need a larger flathead screwdriver to wedge open the back from the front. You feel like you are breaking the thing apart and by wedging it open you make indents in the plastic on the sides of the calculator.Then you need to have a button LR44 battery laying around, which for some reason I had a pack of them. Replacing and putting together it seems to work fine now, by why ship this out with nonfunctional batteries?So if that sounds like the calculator for you, it is good deal.

The product was received on time, but it was not working. The old battery was leaking. I replaced the battery, and now it is working. Apart from the battery problem, it is a shame for HP to produce this low-quality calculator.

No funcionó! Prendió una vez. Y la siguiente vez que quise usarla estaba muerta!

When the device arrived it was on. On unpacking the product I found that on entering a simple computation the result always remained zero. I shut the calculator down and was unable to turn it on again. Upon reading about the battery I opened the calculator and found that the battery was swollen and corroded.I replaced the battery and found that sometimes the calculator would function sometimes it would not. I took out the new battery and threw the calculator away.I am homebound and getting the device to one of the return sites would cost more than the calculator cost. I could have had it pickup up but between the cost of the battery and paying for the pickup, it was not worth the effort. DO NOT BUY AN HP 10s, I believe they have been discontinued while the remaining stock continues to age on the shelf.

सबसे बेकार कैलकुलेटर है

una vez sacamos la calculadora de su embalaje, los digitos de la pantalla no mostraban eldigito completo.... cambie las baterias creyendo que era un tema de baterias y el problema continuo.He enviado un mensaje al vendedor y no responden.Yo no recomiendo comprar esta calculadora aunque sea HP

Horriable! I mean for the price can't spect much! I bought it for a test and the test was Friday & got to my house on a Thursday which was great! I didn't bother to test it till the test I just made sure it turn on! During my test I'm using it and the numbers on the right side screen where faded! Didn't know what was the right answer if it was a one or a 4 even my equations the last numbers where not clear

Dont buy this item, it didn't work on arrival, replaced battery and still doesn't work. Waste of time and money.

The screen is horrible. The calculator is completely useless. Parts of the digits are missing. I bought 12 of them and 6 are completely useless.

Haven't had this calculator long enough to give a proper review. But so far so good. I prefer a white to a black background. Easier to see the extra functions above the buttons. On the display, it has dot matrix on top line and solid on bottom line. The solid line is easier to see. But dot matrix seems to be what most calculators are using. All of the four line calculators that I'm aware of use dot matrix. As well as most two line. The buttons work fine. It has sufficient functions (240) for most things. The only thing missing to my mind are the conversion factors. Perhaps I haven't discovered it yet. Nevertheless, like all modern calculators, compared to what one can put on one's computer, it's just a toy. Or at most a scratch pad.Personally, I'm retired. When I was in school, we used a slide rule. Never found any reason to use anything else. So now that I'm retired, I've bought several electronic calculators just to see what they're about. Easier to use I suppose. But the good old slide rule is better if one knows how to use it. Familiarity is the key, just like any tool. And like any tool, the slide rule and the electronic calculator each has certain advantages over the other. One thing the electronic calculator has over the slide rule, especially for the kids today, is that one doesn't really have to think much to use one. It's all done for you. Don't have to remember anything, like how many zeros after the number or where the decimal point goes. Only need to remember how and where to put in what you want to calculate. They say that the electronic calculator is more accurate than the slide rule. Again, it all depends on how you use them. Prior to the era of the electronic calculator, bridges, buildings and rocket ships were built with total functionality (some still functioning) using the slide rule. It is my opinion that the only reason that the electronic calculator replaced the slide rule in popularity is because it's human nature to think as little as possible. And as I said, one doesn't really have to think much using an electronic calculator.Out of all the electronic calculators I've purchased so far, only one has a serious physical problem. Pressing on the battery lid, which is inevitable on this calculator because it's right where one holds it, turns off the calculator. Not sure what the problem is. A short of some sort no doubt. But even that one is servicable if one remembers the problem. Familiarity.I have another problem with another type of calculator. Small print. But I will mention it in relation to that calculator. Has nothing to do with this one. The print on this calculator is large enough to be quite readable. And I do prefer the two line to the one line calculators. Don't have to remember what I put in. It's right there. My version mental laziness, I suppose.I am concerned that HP Prime is going to have small print. If so, I probably won't bother with it when it comes out. Already have a couple with small print. I don't see so good any more and they're not color. I can still see a slide rule better than these small print calculators. Whether color would help that matter, I don't know. Perhaps it might.But this one works fine and is sufficient for most things. Inexpensive to boot. Something for the kids to consider. They can always buy a more expensive one later if they need to.

This is an excellent calculator. I use it as my first choice whenever I have to solve a scientific math, electrical, or general radio circuit or radio wave transmission problem.I bought three (3) different calculators at the same time -- because my older one died unexpectedly -- to prepare for an upcoming FCC Exam. I used it to pass my FCC Amateur Radio Technician, General, and Extra Exams. I will use it to take my upcoming FCC Marine Radio Operator License (MROL), FCC General Radio Operator License (GROL), and my FCC Radar Endorsement Exams.This is the one calculator that I like absolutely a whole lot more than the others.

achetée en décembre 2011 en panne en mars 2012(et ce n'est pas pour ce qu'elle a servie). Amazon renvoie la balle à HP qui sont injoignables.Bilan,, A FUIR ABSOLUMENT .Ma casio achetée en 1988 fonctionne toujours, je n'achèterai plus jamais HP (mais ça je le pensais déjà vu la qualité de leur matériel.En plus je l'ai payée 15 E et 4 mois plus tard elle est à 10E. Ont -ils besoin de liquider leur stock ?

Another reviewer slammed this because it does not have the look and feel of the traditional HP calculator. Forget about him. This is a great inexpensive calculator. HP quality is not what it used to be anyway. I have one old HP-15C calculator that works beautifully and is 30 years old. Then I bought an HP financial calculator for $35 (an HP-10bII) and it broke after 1 year. Think of this HP-10s as a Japanese calculator with an HP label. It's fine, but not really a Hewlett Packard.Since I first reviewed this calculator, I've purchased a 2nd. The display is failing on the first calculator. The "1" in the first position no longer displays. So this calculator has a lot of capability, but it is made with a poor quality display. I've reduced the rating from 5 stars to 4. It's still good because it's cheap, but don't expect it to last.