PortaPow USB Power Monitor Version 2 (Multimeter/DC Ammeter for Solar Panels, Mains Chargers, etc)

I purchased this to use with my solar panels. This unit is great to verify the actual output of your USB charger or solar panel. Is your 15 watt solar panel actually putting out 15 watts? With this you can actually see the voltage, current and wattage. Be advised that when devices are close to 100% charged they will not draw as much current as a device that is closer to a discharged state.You can also use this to optimize the position of your solar panel to get the most out of it. Solar panels work best facing directly into the sun with minimal angle of incidence. Just move the panel around to get the peak output.It's also nice to see what your plug in USB power supplies are putting out. They are not all the same.It is well built, but doesn't feel particularly sturdy. Time will tell if it lasts a decent amount of time. The backlight doesn't stay on very long, but there is a button below the display that will activate it again if needed.All in all I think it is a very useful device.

I bought both this and a popular Drok unit (w/the OLED display) over a year and a half ago, hadn't used them much since then (after testing a couple chargers around the house)... Are the time I thought the latter was more convenient since itis display is self lit and it's more compact.Recently I busted both out to test at what rate my Google Pixel would charge off an older 2.4A car charger with a Type A to Type C cable... The Pixel has an undocumented feature where it'll actually pick up Apple-like signaling and charge faster than otherwise capable on older non Type-C chargers.Long story short, this tester accurately measures the Pixel as charging at 5V/2A (10W) from my Scosche car charger, not as fast as a Type C charger could go (15W) but good enough for me given the messy state of affairs with those kinda chargers. The Drok by contrast wouldn't allow this combo to ramp up beyond 1.5A or 7.5W.So even tho it's a little more expensive and hitting the backlight button over and over is a bit annoying, this is definitely a better tester, the built in cable also allows you to angle it for easier reading in awkward spaces like a cramped car.

I purchased the Portapow power monitor version 2 in Apr 2015. This is a very useful gadget for me. Like many other people, I accumulate many cables and chargers over the years. I use this power monitor to test them and decide which chargers/cables to keep/discard.For example, I have old iPhone 30-PIN cables that can draw in only 0.49A current while the good ones can draw in 1.82A for an iPad 2. That's a very big difference. Some chargers, although rated 2.4A, only provide 1.16A to an iPad 2, which draws 1.78A from other chargers.There is one thing though that I find really tiresome with this Portapow. I hate that the display is upside down. See photo. When plugged into a charger, the Portapow naturally hangs in a way that the display is upside down. So you try to read it the way it is, or turn your head, or turn the gadget up. I would much rather not have to keep turning the gadget up (so that the display is oriented properly) as frequent handling of the cable increases the likelihood of damaging it.The other thing I don't like about the Portapow is you have to keep the button pressed if you want the display lit. Now, when you're testing many cords/cables/chargers in one sitting, it's pretty annoying to have to keep pressing the button. I would much prefer having a switch to keep the display light on permanently (while plugged in to a power source) until I switch it off myself.Edited to re-add photo that Amazon didn't include during "review processing". Why does Amazon keep doing that?

I bought this USB Monitor several weeks ago and I love it. I've used it to see what the output on various chargers is and what the draw is from different devices. I found that there's a huge variation in chargers and it pays to pair specific chargers up with the device being charged. I have a wrist band that only draws a small current so I now have my poorest/cheapest charger set aside to use with that. My iPhone 5s draws about 5 watts, my iPad almost 10. Some of my older or cheaper chargers won't put out the 5 watts that the iPhone can handle so it takes longer to charge. I have chargers that will keep up with the max draw on the phone but not the iPad. It still charges, it just takes longer. I have another charger that will put out the 10 watts that the iPad needs so I charge it there. That charger has two USB ports and plugging in a second device drops the power output on the ports since its max output is split. My new iPhone 6s Plus draws closer to 10 watts so now I need to reevaluate. Putting a device that can draw 10 watts on a charger that can only output 2 watts means that it's going to take longer. The older and/or cheaper the charger, the less power it probably can put out. There comes a point where you need to get rid of at least most of the old ones.This Power Monitor will let you optimize your charging time, it's well worth the price. I think I'll give a couple away as stocking stuffers. Knowledge is power and this will tell you about USB power.

Un piccolo strumento che contemporaneamente fornisce Volt , Ampere e Potenza in Watt, cosa c'è di meglio. In più si aggiungono le ridotte dimensioni

perfekt um leistung, ausgang, spannung, etc zu messen.zweck erfülltnutze es wirklich oft, einfach anzuwenden und effektiv und schnell was ergebnisse angeht

This Volts/Amps/Watts meter works extremely well. The only time I had any trouble reading this, the current a device was drawing was fluctuating rapidly in an extremely erratic manner. (I've only seen that happen once.) When using a Power & Data cable, the Data part is passed through this meter in the manner I'd expect. The large LCD display -- with an LED backlight I can toggle ON for a few seconds as needed -- also ensures the meter itself consumes as little power as possible.This meter really proved its worth while I was finding a USB charging cable for a PiPO tablet. (Uses a 5V 2.5mm power jack, that should go into a 2A charger) The first 2 suppliers each provided cables that only provided about 250mA of charging current. While the cables from a 3rd supplier charges at about 1.5A (An expected or "normal" result for a max. current draw of 2A.)The meter is also useful for determining when a device or external battery bank is fully charged -- as the current draw usually falls to nothing (or almost nothing) once the item has finished charging.

El ayudante perfecto para comprobar la corriente que atraviesa un cable y así diferenciar entre los cables buenos y malos.

The media could not be loaded.  Ne voulant pas sortir mon multimètre pour mesurer l'intensité (A), la tension (V) et la puissance (W) de petits appareils USB, j'ai donc acheté ce mini contrôleur qui affiche directement toutes les données citées plus haut de façon simple et claire.Il suffit de brancher la prise USB qui se trouve au bout du petit cordon sur un port USB de votre PC, puis de raccorder votre disque dur externe ou produit similaire sur la prise située sur le côté du contrôleur pour voir apparaître la tension, l'intensité et la puissance consommée.Je recommande ce produit pour ceux qui sont curieux de savoir combien consomme un téléphone portable en charge, un disque dur externe ou tout autre appareil USB qui consomme du courant.Seul reproche : l'affichage lumineux se coupe automatiquement au bout de quelques secondes, mais bon.. pas grave !Serge D.