72W Power Supply Adjustable DC 3V ~ 24V Variable Universal Switching AC/DC Adapter 100V-240V AC to DC Converter with LED Voltage Display and 14 Tips, for 3V to 24V Household Electronics - 3000mA Max

This power supply has been reliable for many pieces of electronics for me to test with. The Voltage tends to drift up slightly when it's used for a while, but only on the order of .1 to .2V. My unit does not get very hot, is not noisy (no audible sounds). The size is nice: some may not like that this is of the style with a box in the middle of the cable, but this does mean it doesn't take up a large space on a power strip or outlet to block other available ports.

Bought two of these to provide “plug-in” power to solar Christmas lights. The solar lights quit working, so decided to power them from AC source. These provided quick hook up and could be adjusted to the 3.2 volts necessary to run the lights. They’re priced right and are working great for me.

This thing should be in very household. If you have many electronic devices like I do, occasionally one stops working or charging. Having a versatile and adjustable power supply is a must for troubleshooting and getting a device going while you order a replacement power supply. It has many connects sizes that should fit almost every need. I will give you one WARNING. The device comes with a six-inch extension output cord that seems to have no use and does not state what it is for. Well, what it does is reverses polarity, so you should never use this unless you are sure your device has the positive power on the outside of the connector, which is very rare. Reversing polarity may fry your device! It's nice they included it, but there should be a big red label affixed to it that states what it does. I dinged it a star because the voltage potentiometer (adjustment knob), is way to sensitive and its hard to set the voltage exactly, There are no detents or click in spots for the voltages so you have to fiddle with it and hope the knob doesn't get bumped to a different voltage during regular use. Other than that, it's a keeper.

Works good but use with caution. You could easily and instantly damage expensive electronics because voltage is variable and it's easy to accidentally change with a light touch of the control knob. I recommend using a meter to confirm the voltage before plugging anything in and then carefully put the control in a place where it will not fall or be disturbed.

Great power supply! I bought 3 extra, powers my laptop, vintage audio decks, 2 way radios, scanners phones.. everything!

It's an excellent PSU that will save the day whenever you loose the PSU for this or that laptop, router, or this or that rechargeable gadget (eg handheld vacuum cleaner). My only suggestion would be that the crossover cable should be labeled with a little caution sticker. In my case, I failed to read the product description that hinted of this little cable (Package included 1x 72W Universal Power Supply Adapter; 14x DC Tips; 1x ===>> Reverse Polarity Converter Cable <<=== ) . This cable would be used if you ever wanted to generate negative voltages (-24v through -3V )and 99.9% of people out there will never have any need for this. In my case (silly me) I thought it was a convenient small extension cable for marking a preferred plug to have handy, and soon I made some sparks fly on my Lenovo. A little warning label, "caution, use only if you know what you're doing" on the polarity inverter would have been nice.

Pretty good quality item for the price. The voltage selector is a dial and is VERY touchy causing the voltage to 'float' (kind of like how an analog video game joystick drifts). This makes it impossible to set and maintain exact voltage. Works fine for older electronic devices that will tolerate variation in voltage but not recommended for uses that require exact voltage settings.

This is a great little power supply for providing various voltages to random devices you lost the charger to. I found a used camcorder at Goodwill for $5 that didn't have a power supply. I only needed it for a few weeks while I converted old family videos from High8 to digital. This had the right size barrel connector to swap into it and I dialed in the correct voltage for the camcorder. No muss. No fuss. Completed my project and now I can donate the camera back to Goodwill for someone else to use (but keep this little beauty around). One thing of note that I wish they'd improve, however: The dial is SUPER touchy. I'm talking "breath on it and it'll jump by .1V" kind of touchy. I highly recommend dialing in the voltage BEFORE you attach it to anything, as the sweep is very fast and very twitchy until you dial it in.