Power Bank Portable Phone Charger 27000mAh High Capacity External Backup Battery Pack 4 USB Ports Quick Charge LCD Display 3 Input Powerpack for iPhone Samsung iPads Huawei Nintendo Switch (Black)

I have had one of these for4 just over 2 years, it keeps it's charge when not in use and will easily charge 2 items at once. Recharge time is not too shabby and the digital display reminds you how much is left.All in all a good item to have in case you need a bit of a boost when you are out and about. Not as heavy as it looks but not for a pocket but ideal in a backpack or laptop bag. I would recommend this product.

These days. it feels like I constantly need to charge something up. Especially my phone, when Bluetooth is enabled to sync with my smart watch and I listen to music using Wireless earphones.Previously, I had been using the charging case from one of my sets of earphones to charge my phone and it worked quite well, except it wouldn't ever fully charge my phone.So, when I saw this whilst browsing Amazon, I knew it was the solution for me.It provides three 5 V / 2.4 A input ports, two USB 5 V / 2.4 A and 5 V / 1A output ports and allows simultaneous charging for up to 4 devices.It looks good, with an interesting mix of lines and curves in various matt black finishes, with diagonal lines going along the front and back (presumably for grip). The size of the charger is absolutely fine. There is a display in one corner, which confirms how much power is left inside the charger. To calibrate this display, the charger needs to be fully charged and then allowed to drain completely about three times and then it will provide an accurate display of remaining power.Fair warning, this is heavy and if you know anything about batteries, it's not a surprise. It is shown in photos and mentioned in the product details.If you are always on the go like me and need to charge several devices at once or a single device over a number of days, this is a good charger to choose.

UPDATE: following a few weeks with the pack it's evident that the display is inaccurate, despite several (6 or 7) full charge and discharge cycles to calibrate. The major issue being that the protection circuit cuts power to devices when counter reaches 0 presumably before the pack is close to fully exhausted. So although I am able to on initial charging input almost 27ah. This amount of energy is not able to be extracted. Unsurprising perhaps give the price/quality. Its still a big pack and will charge devices many times but given size and weight perhaps not worth the extra bulk given supply limitation. Buyer beware.Original review:I've tested the pack by fully charging then discharging to 0% then recharging to 100%. The pack continues to take current past the display showing 100% this is expected and likely part of the initial calibration of the pack display descriped on the tiny square of paper you might miss. I used a USB ammeter to watch the energy transfer. The good news is that it appears to be very close to 30ah. Typically a battery with an advertised capacity might not be able to provide all of that energy as a percentage is held back by the system to protect the cells. This is a classic gripe of the less knowledgeable on these listings. Now this depends greatly on the quality of the pack. This is obviously a cheap pack but does have safety features I can crudely observe using the ammeter. In the past I've used Anker and still have a couple. The Anker packs are tough, safe and provide close to advertised capacity. Many of these USB packs use 18650 cells. This pack appears to be based on pouch cells, the warnings that come with the pack seem to back up this theory which is a presumption of mine based on the design.I cant accurately give a rating for longevity as I've only just got it but I can say the following:- Appears to provide advertised capacity.- Capacity Indictator is nice. (make sure it's calibrated) prob don't rely on it to 0% as this will prob kill the pack.- Perhaps not as safe or rugged as a pack based on 18650 cells.- Supports pass through charge which while appealing isn't great as it may mean a lack of safety features. (unless I'm missing something in the very spase instructions).- May not last as long as a pack with more sensible sizing and design.- Buyers are advised to take care with the item, I'm heeding these warnings one of which states it should not be left unattended in a car. 😬- Perhaps if you're flying, look at a smaller pack? this might raise eyebrows if anyone is paying attention at the airport. There may be rules where you fly to so prob best be smart and look into that.- it's not clear if the pack will charge more efficiently via multiple inputs. When applying two inputs the input current is halved so there is some safety feature here to limit input current which is a good thing.- Given the potentially questionable safety of the pack, (pouch cell and pass thru charging) it may be sensible once calibrated to not discharge the pack fully perhaps shoot for 25% I plan to continue to testing and take a look at voltages to see if that reveals any thing about the pack configuration.- The provided cable does not give the most charge current. I used an anker cable but tested a number or others with my ammeter and have a couple that will provide 2a charge current. This will obviously depend on your wall wart.- The pack continues to charge past 100% so you will want to think about this fact when charging. For safety it may be useful to have an ammeter, although I can't see that being the preferred approach of many. Currently I have put 25ah into the pack. The current appears to be dropping and I expect the pack to reach 30ah.If you read to here, congrats you are as sad as me.Time will tell. The one thing that will be obvious is that when it fails it will bulge, (if I'm right about it being pouch cells) so that will be time to get rid of it ideally fully discharged. I can only imagine what 30ah of lipo pouch would do. Be safe people this is a serious lump of energy.

Leaving a review after a few months usage. Using this for powering electronics in a summerhouse. Plenty of power that lasts a day when plugged into iPad or iPhone. Used to to charge lights, iPad, iPhone, kindle and more that I’ve probable forgotten. This power bank takes time to charge fully but this is totally understandable with the amount of power it stores. I have not used the fast charge on this yet. Honestly this has been a god send over the summer and will be getting another before the winter so that I can spend even more time in the summerhouse.

It's big, heavy and ugly, but it's got a huge capacity for charging. It won't win any awards for looks, but this can last me most of the week if I'm charging my phone or fitbit.

EDIT, FROM 5 STARS TO ONE STAR.THE POWER BANK WENT DEAD AFTER OCCASIONAL CAREFUL USE AT THE END OF AUGUST; ONLY A FEW MONTH'S USE. In my experience power banks tend to be overrated by their sellers, sometimes rediculously so. The two 20,000mA power banks I already have are quite good, but one provided 8,000mAh and the other 9,000mAh on test with a 600mA load. One needs to "lose" 35 to 40% because of the step-up from 3.7 to regulated 5v and conversion loss as the banks are rated according to their battery capacity and not what they will actually give. Also, internal circuitry will cut out before the battery is flattened to preserve its service life. Even so these power banks, although reasonable quality, should have given around 12,000mAh.This power bank gave about 16,500mAh at a 1A load which is better. In fact it performs well and its micro USB charging cable is nearly 1m in length, which is good. There are Lightning and USB C (I think) sockets for charging the bank as well. People sometimes complain about batteries being heavy, but if you want the capacity this small price has to be paid. If dropped onto a hard surface from a metre or more the case may not take it.

Hält lang, Läden mir mein Macbook und das iPhone 2 mal auf.Allerdings braucht die PB lang, bis sie selbst wieder geladen ist.Aber für ein Wochenende, wo man nicht unbedingt viel Strom zur Verfügung hat, eine echt gute Alternative.

No es carga rápida! Puse a cargar un celular y tardó hoooras y para cargarse por si misma este powerr bank demoró 27 horas!!.Lamentablemente compré tres de éstos, un fiasco!!

Dopo quasi un anno di uso quotidiano funziona come il primo giorno.Un pó lenta la ricarica da 0 ma una volta al 100 fa il suo lavoro perfettamente.

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Ottimo powerbank durata eccellente ovviamente per caricarlo occorre molto tempo visto la capacità di quasi 30000 mah