imuto Waterproof Power Bank, 20000mAh Portable Charger 65W Fast Charging USB C PD 3.0 Heavy Duty Battery Pack, Rugged Power Bank for iPhone Tablet Laptop Hiking Travel Camping

I do fun things so you don't have to. And in this case, the fun thing was that I tested both ports of this power bank to see what charging protocols they supported, make sure that they could hit their spec'd voltages and currents (and therefore wattages), and to do a discharge test to see if the capacity number is real (for a lot of off-brand power banks, the capacity number is a lie ... but spoiler on the rest of my review: THIS POWER BANK MEETS ALL OF ITS SPECS (and is generally excellent)!.First things first:The USB-C power can do 65 watts in and out, as claimed. It supports USB PD, with PPS, so it will 'super-fast charge' a Samsung phone. It also charged my HP Zbook Studio when the laptop was off, but wouldn't do it when the laptop was on (I *think* it's because the zBook gets confused by in/out port on the power bank and tries to transfer power in the wrong direction). This power bank actually follows the USB PD spec and doesn't support older QuickCharge variants on its USB-C port ... and while that is the *right* way to do it, it does mean that this USB-C port will not fast-charge some older USB-C devices that don't support PD (everything made in the last few years should support it, though).The USB-A port also meets its specs, and supports every charging protocol under the sun. See the photo of my USB analyzer plugged into it for the whole list of protocols. They've definitely go their bases covered here.The capacity measured out to just over 64.5 watt-hours at my DC load, which means that this thing is delivering around 88% of its internal battery's rated capacity to the device being charged. That is simply excellent. That means that the internal boost converter used to generate the output voltage is probably > 90% efficient at the 15W discharge rate that I used ... and it shows, this thing doesn't get hot when charging. Much better than virtually every other power bank I own.Finally, this has a 'trickle charge' mode that can be accessed by double-tapping the power button. This allows you to use the power bank to run devices that draw very little current and that the power bank might not normally detect. Things like earbuds, or devices that use USB as a power supply -- things with very low power requirement. This is the first power bank I've had with this feature, and it's a GAME CHANGER for me. I have tried to use power banks to run my kids noise makers (for sleeping) during power outages in the past, and they've all shut down due to low current draw ... but this one will stay on with just my USB analyzer plugged in, which draws virtually no current. Absolutely excellent!Lastly, an aside on power bank reviews: on this power bank and every other power bank you'll find some rocket scientist who plugs in an analyzer, discharges it, and sees that the amp-hours don't match the specs. I've even seen major YouTube channels make this mistake ... but the issue with that is that amp-hours aren't a measure of energy capacity. That's watt-hours, and I'm happy to see that this power bank provides that number on the back -- 74Wh. The number of amp-hours that you get from a 74Wh battery depends on what voltage you take them at. The capacity is rated based on the 3.7V nominal voltage of a standard Lithium Ion battery (20,000mAh) ... but since nobody every discharges at 3.7V, you can't compare the amp-hour number given by a USB meter to that given by the spec sheet. Think of it like a transmission -- I might have a battery rated to power the input shaft through 1000 full revolutions (roughly the mechanical equivalent of 'amp-hours', in this scenario), but without knowing the ratio of the transmission, I can't know how many revolutions I'll get on the output shaft. The boost converters used to generate charging voltages in power banks perform very similar conversions, and cause similar problems problems when attempting to compare the amp-hour rating of the battery with the amp-hour rating used on the meter.

Extremely durable and solid battery pack that is small enough and light enough to carry on a long run to power my lamp. Charges as expected and does not put off any excessive heat.

Producto excellente asi como lo describen por buen precio

If you get this for what it is, just a battery with it's own charge controller and USB output, then it's great. If you really, really need something waterproof and rugged, this is probably not it. If the product page was more honest and didn't make this seem like something much more durable than it actually is, I would not have been disappointed when I got it. Four stars for the typical misleading claims on an otherwise great product. Also when trying to get support from this brand, they never replied.TLDR:Great: Has a charge controller (5-20v/60w), delivers rated input/output (65w) and capacity (~80% or 60wh), hi temp current throttling, over current shutoff works, and pass through charging works.Not so great: Not water "proof." Case is all hard plastic. Current indicator is just "fast/slow". No support from company. Single In/Out port makes charging another single port power bank tedious. For a "solar" battery it's quite heat sensitive.FYI: DC connector is 2.5mm, need an adapter for 2.1mm.Bunch of words:So first of, this doesn't seem to have any real competition so the exaggerated "outdoor" marketing is really unneeded, just market it around the DC input / charge controller and I would have still purchased and I would have been more satisfied because I would not have expected something this is not. This is no more "rugged" than any other plastic case power bank. The whole thing is hard plastic, the lighter color is just barely softer. If you press really hard with a fingernail the "bumper" will give just a bit. I would avoid dropping it. The ports are not sealed so you would be putting a lot of faith in the hard dust covers to keep water out. I would not submerge this at all, but is should be ok with a bit of rain when not plugged in.This was the smallest power bank I could find with a solar charge controller a year ago and that seems to still be the case. Nearly every other powerbank on amazon with a variable DC input also has an inverter or a huge battery (as far as backpacking goes). This brand also sells what is basically a smaller solix, but it failed so I can't recommend it. Using smaller solar panels with only USB output is generally leaving power on the table since there has to be an overhead to meet the fixed voltage for the usb spec and then any variability will often cut the output altogether. With this you can still be charging (even if slowly) in conditions where a USB output would not work. You can also get more even in ideal conditions. For example I have 30w panels that never output more that 15w from USB C, but will output 22w directly. Of course you need a panel with a direct DC output.As far as the specs go, measured Type C PD output and input at 65w, if it is cool. I left it discharging on top of a comforter in a 78F room and came back to see the output had dropped to 20w. Checked with a thermometer and the case had 120F hot spots. Moved it to a concrete floor and turned a fan on and after the case dropped to about 90F the output climbed back up to 65w and stayed there until it dropped to 60w at an indicated 2%. When plugged in even without letting it cool off, it drew 65w right away. Charging draw dropped to 40w at around 90% indicated. However I would not put much faith in those SOC numbers, when left plugged in it flashed the current icon (cell balancing) for another hour. I only have 5v Type A devices, so never saw more than 12w from that port.Measured capacity discharging at 10w was generally about 60wh provided and charging at 15w was about 90wh used. That averages out to ~75wh. Discharging and charging at 65w averaged closer to 73wh, which is still in line with the listed capacity of 5000mah @14.8v or 74wh. Some other reviews said they got 65wh out, I never saw more than 62wh. Still overall loss was about 17-20% which is typical for something this small. As many are aware, manufacturers list the capacity based on the cell or pack voltage which is sort like saying your engine has 100bhp but when you put it on a dyno you only get 80whp because there is a bunch of stuff in between. Same thing here, a bunch off losses between the cells and the device you are powering. Most losses boil down to things getting hot and when things are close together they stay hot. Also since phones started out using the same voltage cells, everyone got used to amp hours being comparable, but they are really subjective to voltage. The product page for this advertises 20000mah, but that would be if it had a lower total voltage than it does, it's just to try and compare to other power banks.Some other things. The total power in or out is only indicated as one or two lightning icons. The amazon page clearly says one is less than 15w and two is more than 15w, the manual says one is less than 12w and two is anything more than 12w. In testing this actually appears to be closer to 10w. Also somewhere below 1w both icons will turn off, but the display will stay on. Considering this can charge up to 65w, this all seems really arbitrary and ambiguous. Really leaves a lot of guessing. There is already a numeric display, would have been nice to have it at least cycle between SOC and total power.Lastly I should mention I had another imuto product (power cube) which failed and when I tried to contact imuto via their website and listed email address I never got any reply. So test this as much as you can while it can still be returned.

Nice design and slimmer than other power banks

So after a year of usage this piece of brick won’t charge anymore and it is hard to get any product support on this. Even the imuto site itself is hard to navigate to look for their support page.

The device worked great for a few months. Then it froze in some manner and since then does not charge and crashes any intelligent charge bank I try to plug it into. Bricked. I probably got a lemon but wanted to review as an FYI.

I saw one that a co worker had and was very impressed. I’ve had other versions of charges that never lasted more that a couple months