Milligram Scale with USB Supply, NEWACALOX Reloading Scale 100 x 0.001g, High Precision Portable Multifunction Lab Powder Scales with Calibration Tare Weights, Tweezers, Weighing Pans Black

I purchased TWO identical scales model 8028 series 100 g capacity in October 2018. Both arrived timely with all listed accessories including two AAA batteries, plastic tweezers, powder / liquid holding cup, 100 g weight. I chose 100 g model so I could check very tiny objects and some postal packages as well. 50g model seemed less attractive to me, even if it might do better job on tiniest objects. Maybe. This scale looks very elegant and professional, it looks as good or even better than some scientific instruments I purchase at work. Considering its price, I hardly can believe it is so accurate as specified. I decided to check accuracy and compare both scales a week later, at typical room temperature and humidity 50%. I check both scales with very little weight, where usually scales do not do well.Both scales stand next to each other, on flat glass table surface. Tiny non-slippery pads work nicely. I use two small pieces of paper as weights, turn ON both scales at a time. Calibrate both scales to 100.000 g with the same 100 g weight, start measuring both pieces of paper positioned always as close to the center as possible. I swap measured objects between both scales, while taking notes - to include any scale circuitry warming up effect if any. I do it slowly, wait about 5 sec each time, hoping to capture some reading changes or fluctuations. Here is what I got, final readings each time:SCALE A. SCALE B0.013 g 0.013 g0.014 g. 0.014 g0.013 g 0.013 g0.013 g 0.013 g-----------------------0.091 g 0.090 g0.091 g 0.091 g0.090 g 0.091 g0.091 g 0.090 g0.090 g 0.091 g----------------------0.013 g 0.013 gDuring all measurements there was no reading fluctuation, no reading noise on last digit, no reading changes except a few times final reading after 5sec was 0.001g higher than first, immediate, instant reading. Numbers above show really repetition, not accuracy - still excellent product.SMALLEST WEIGHT that can be detected. I took a small piece of Kleenex tissue. Scale showed 0.013 g. I divided it into two pieces, scale showed 0.005 g and 0.007 g initially, but I could not repeat this. It seemed 0.005 g was not detected most of the time, scale showed 0.000 g. Similar test with a tiny piece removed from a small clear packaging bag resulted in showing -0.003 g. I understood some tiny static forces influenced readings below 0.010 g. At a time, 0.013 g paper is detected very reliably! All this while full range is 100.000 g. Incredible!DISPLAY is rather large, reads nicely and easily in a bright room. Does such scale consume a lot of current? I am thinking how to check on this, as I have many gadgets at home that use batteries too quickly in my opinion. Current consumption for this scale measured gave 8.2 mA, immediately after power ON. With typical AAA battery capacity (Google "AAA battery capacity") rating 1000 mAh it seems battery life should be about 120 hours. I expected little less current consumption, but this is not bad at all - specially considering battery that is not 9V type. Interestingly market is flooded with rechargeable batteries and this scale manual does not say if OK to use rechargeable batteries. I guess no big deal in this case, considering such fact that most rechargeable batteries do not hold charge very long time.AUTO OFF function: When I started calibrating both scales, one scale went OFF after about 30 sec. The other one never did this during entire testing time. I assumed scales go OFF after 30 sec when no activity detected, otherwise they continue working.Overall I am delighted, I never thought I could have such sensitive scale for less than $25. Five stars!

The media could not be loaded. The 1st time I bought this scale was about a year ago and I fell in love with it because it's accurate and the ONLY one that's able to read from 0.001g up to 200g. Other ones go up to only 50g.I saw some reviews where people are complaining that the 100g weight that's provided with the package for calibration is wrong because it should be 200g weight but that's not the case because when you click and hold the "M" mode button you'll see 200g lights up on the screen but when you click on "T" tare button it shuffles downward to 100g, If you press again it'll show 50g, then 20g, then 10g, then 5g, and then back to 200g with each time you press the tare button. That being said, in order to calibrate with that 100g weight oh you have to do is hold the mode button and then click the tare button to change it from 200g to 100g and then calibrate. I have tried calibrating it with 100g, 50g, 20g, and 5g weights and every single one of them worked the way it should and showed very accurate readings. I have verified with a lab scale 0.001g that goes up to 500g that costs $200 and the readings were off by 0.002Which is close enough for what I am using them for which is to weigh different nutrients and plant hormones and other extremely light products. If I was using it to make jewelry then I would definitely buy something more reliable like my lab scale but for weighing nutrients this little scale exceeded my expectations. I am very happy with my purchase and I highly recommend it to anyone who needs this type of scale but to handle something heavier than 50 grams.

The scale itself is perfect, but the user manual is weak and the TARE button is useless (and dangerous). DON'T USE THE TARE BUTTON ON THIS SCALE!!Pros: The impressive range of 0.001 g to 200 g is unique among milligram scales; most only go from 0.001 g to 50 g. That's 4 times the standard range! It's also amazingly accurate throughout this wide range. If you need something more accurate, be prepared to pay HUNDREDS of dollars for a laboratory-grade scale that can measure to the nearest 0.0001 g (nearest 100 mcg). Most people will never need that kind of accuracy, unless you're dumb enough to use fentanyl (in which case you're probably too dumb to use a lab scale in the first place).Cons: The instruction manual is vague on several points. I had to watch the video in the product description in order to properly calibrate the scale, but that's forgivable. The TARE button is an accident waiting to happen (gives both false high and dangerously low readings. Only use the TARE button if the the scale does not show 0.000 with nothing on it -- NEVER use the TARE button for an empty vessel (which is what it's designed for). After doing some research, I found that two other brands of milligram scales have the same issue with the TARE button.