Charmast Mini Power Bank Fast Charging, 20W 10000mAh Small Portable Charger USB C with PD3.0, LED Display Rechargeable Portable Battery Pack for iPhone, Samsung, Pixel, Other Smartphone, Tablets

Bought this very compact power bank to power an ageing Garmin cycle computer for long rides.Have an up front Garmin mount that allows access to the charging socket and secured the p/bank to my bike top bag. Charging cable needs to be long enough so it doesn't restrict steering.Worked a treat over a 6hr ride. At end, Garmin showed zero charge, power bank still showing 100%It's 164g

Amazing portable charger. Super efficient and fits in my small hand bag. Battery last many full charges of my phone!

My son has had so many of these looses them all the time, his had this one a year which is an achievement. Performance wise it’s a good charger, and charges fast. unfortunately a year on and the numbers don’t show in the screen, I can only make out it’s fully charged as it has 3 distorted numbers indicating it’s 100%

This has a footprint a bit larger than a credit card (obviously a lot thicker) and so is easy to put in a pocket. The capacity should give almost 2 phone charges allowing for internal losses and with fast charging protocols and a choice of USB A & C it's easy to live with. The capacity indicator is useful and presumably the low charge mode helps although the manual included doesn't seem to cover it. (2 secs on power button and 2nd digit rotates on & off).For my use of camping and motorbike use, it's a good weight (actually 168g) and supports charge into the bank and out to a device simultaneously. I can charge the bank up on the handlebars and also charge a headtorch, so when I get to camp all good to go. Happy with purchase and would recommend.

I can't recommend this little power bank enough, especially if you're looking for a compact, slim and relatively lightweight powerbank that will slip inside a pocket or handbag, etc.I have two other Charmast powerbanks which have been absolutely excellent over the last two years of ownership. But they are the larger sized units, and I was looking for one as as sort of EDC carry item.I tested the capacity of this unit and it came out at 43 watt hours! At 3.7 volts nominal battery voltage that's practically 12,000mAh. And this is the first charge, so it will likely creep up over 12,000mAh on the second charge. So it exceeds it's rating by 20%... The first powerbank to do so in my tests.Fast charges perfectly fine and recharging took around 4 hours at 18-19 watts. Feels very nicely built too, 28th a handmade battery percentage display.Very happy!

good stuff

Just received and used it straight away as it was charged and it’s gone red hot and I can smell hot plastic, will have to throw away, waste of money be careful!

I needed a powerbank for backpacking, couldn't be too big but needed to be able to charge my phone a couple of times.It might be useful to know that you should never plug in your phone directly to a public charger, your phone will then be viewable to anyone on that wired network who has nefarious motives and the know how to snoop into your phone - as a traveller I always charge the powerbank from the public ( or even hotel) USB sockets and then charge the phone with the powerbank. I see folk all over the world at stations, airports or even restaurants plugged into a public USB, obviously not every network will be monitored by villianous "ner do wells" but it only has to happen to you once especially when abroad and you will be in a heap of trouble should your phone be compromised.Weight is an issue for a backpacker and I am fussy about traveling light, this is the perfect combination of light weight with enough power to keep my phone in the game.I have other powerbanks from this brand one of which is several years old and is still going perfectly strong always giving a full charge.I hope this review helps you to make a decision on your purchase but I strongly recommend this powerbank