ROMOSS 65W Power Bank 40000mAh USB C PD Portable Laptop Charger, Phone Charger, Fast Charging External Battery for MacBook Air, MacBook Pro, Dell XPS, Apple Watch iPad Pro iPhone 15 and More

Update: after about using it for a month somewhat regularly (maybe 4 full discharges every week or so), the capacity seems to have become somewhat finicky. Now a full charge from 0% to 100% is reading as a transfer of 137 Wh, a full 11Wh decrease within one month. However, even though it reads 100%, it will still trickle charge a bit further if I unplug and plug it back in, leading me to believe that the capacity estimator is not particularly reliable and that the true capacity might not have changed as much. Besides this, I overall still feel like I get the same life out of it in daily use. Still highly recommend for laptops up to 65W.Don't pay attention to the other reviewers saying that the mAh is incorrect. mAh is voltage dependent, so if it's charging at a voltage higher than the voltage of the individual cells within the power bank, it's going to result in a lower mAh readout for an equivalent energy output (Wh). The rated 148 Wh is pretty much on point for mine (charged from 0 to 100). Charging and discharging rates are also as advertised, capable of maintaining constant 20V transfer and up to a peak rate of 50-60W as far as I've seen. I just received it, so I can't comment on longevity yet.

This item worked great for about a year. Now I can charge my S22 Ultra 3 times and when the % is at about 35 ... It goes dead.

The power bank doesn’t charge my laptop. It charged a few times at the very beginning then just no longer charge. Changed different cable but still not working. Fine with charging the phone.

I got this for my Steam Deck when I travel, I like everything about this except size and weight, it charges my phone in Super Fast Mode and charges my Steam Deck fast too, has plenty of power to charge multiple devices, the downside is the size and weight I took it with me when I was traveling and I had to keep it in my suitcase or hotel room until needed it's just to big and heavy to just carrying around with you all the time like other portable chargers, but if I had a backpack it would probable ok, other than that it's great I use it all the time on all my devices even at home if I need to charge something quick.

The included guides are practically no help, this item was sold without a charger, and I was VERY close to giving up and returning this...but I've decided to hang onto it, and so should you.I still have no idea what the side button does besides change the display (two clicks does...something?) and there is no discernable explanation on the 2 "fast charge" modes (enabled by 3 button clicks I think) beyond one mention in a picture in the original listing on Amazon...but despite the faults (all of which could be fixed by including a better guide/manual) the product itself is solid.Yes, it's a heavy brick. ...BUT it's a heavy brick that can charge overnight and is powerful enough to run my micro PC (that I use for Xbox and PS game streaming) for like OVER SIX HOURS of steady game streaming. It can power my micro PC and displays for over EIGHT HOURS when just browsing the web or streaming video. And because it has the USB-connection and smart functions, I can literally plug it directly to my PC that usually runs on a 65W power cable

I recently purchased this charger for a trip across the country. Im so glad that I did. This charger is dependable. Of course there's a couple downsides to this charger. 1) It takes a few hours to fully charge it. 2) It is heavy. However when my ipad pro says low battery this is the charger I reach for no matter where I'm at, even at home because I KNOW that I will be able to use the ipad within 15 minutes with a decent amount battery restored due to ROMOSS charger. I have also used it to charge my laptop and gopro batteries with great response time.Without hesitation I would purchase this charger again. The time lapse of the included photos is approx 1 hour, it charged my ipad pro 12.9 from 9% all the way to 65% in that allotment of time. Anyone who owns that model ipad knows if it gets that low it will take quite a bit of time to charge for use. I hope this review is helpful.

Can do 65w to a Microsoft surface pro 8, super fast charge (45w) to Samsung tab s8+, and fast charge (15w) for Samsung s9+. At 72% when it arrived, it charged the surface to full once and the s9+ to full 3 times before hitting 0%. Since it's a 148 watt hour battery, that's pretty darn close to what it's rated for.Instructions say to run it down to 0% for it's first discharge cycle, and it charges to 100% in about 4ish hours with a 65w USB C charger.Feels very sturdy and doesn't heat up much when charging or discharging. Very solid product!Only potential downside is that you can only do 65w discharge from the USB-C port, so if you are using lightning or USB-A ports it's not as much. But, you can do 28/45w on USB-C plus 15w on the others at the same time (super fast charge on tab s8+, and fast charge on s9+) which is nice if you need to charge 2 things.

Absolute beast .Charged myiPad Pro 12.9 inch 3 timesMy iPhone at least 5 timesMy fold 4 at least 4 timesMy Apple Watch countless timesAnd my Rog ally 3 times ( doesn’t support 30w mode )And I’m still at 40% juice leftTakes a whileTo fullyCharge unless you have a beastly 45w or more type c charger .But that’s anything.This guy is a must have for any campers , long shift workers or doomsday Wes lolIf the power went out this thing wouldJuice most of your essential tech many times over .

Hatte diese Powerbank insgesammt 2 mal bekommen.... jedes mal war sie defekt. Hat anfangs immer geladen und sobald sie einen bestimmten entladezustand angenommen hatte, brach alles zusammen. Der Verkäufer wälzte zuerst alle schuld nur auf mich, und das ich der einzigste Kunde damit sei. Nachdem er sie aber selbst geprüft hat, versicherte man mir das ich eine Funktionierende bekomme, was leider nicht passierte. Diese war genauso defekt.Service schleppend,Produkt mangelhaft,Verkäufer keine Hilfe leider......

充放電を何度か繰り返して測定したところ、120Wh程度の測定値であり、40Ah（148Wh）の容量に嘘は無いと思われる。大きくて重いのは当たり前で、こんなに大容量が5,000円弱（20%クーポン使用）で手に入るのは正直驚きであった。また、65W出力も本当で、20V、3A程度でノートパソコンに充電出来る。謳っている性能に偽りなしで、大きくて重くても良いなら買って損はない。

The media could not be loaded. ROMOSSの前機種40000mAhはPD非対応19V非対応だったから単に大容量のモバイルバッテリーだったけれどこの新しい40000mAhのは12Vで40W、20Vで60Wの出力が得られるから12vのエアコンプレッサーも動かせるしノートPCのサブ電力でも3時間は動かせる。対応するトリガーケーブルさえあれば、何でも動かせる。バイクならジャンプスターターとしても機能するかも。充電時間は0％から100%までPD対応充電器で2時間程でした。2割引の4780円だったし、ええもん買ったわ(*'д｀）

The media could not be loaded. USB PD20Vで給電するも数Wしか受けず、このまま1時間置いても0％のまま他の機器を充電しようにも出力なし充電器やケーブルを変えてもダメ20V給電時にジーと異音、このまま放置すると若干発熱あり検証に使った充電器とケーブルはswitchが充電出来てるので、switchがUSB PD要求されるのが15Vとはいえ問題ないはず購入から1ヶ月立たずに充電、給電共に不可能になるのは聞いてない…使った感じ容量詐欺はなさそうだっただけに残念だけど、これ書いてる段階で在庫なくて交換出来なさそうなので返品だな…

量販で売られているスマホ用の20000mhAのバッテリーの倍位の大きさだろうと思いポチりましたが実際には3倍近い大きさ(体感4倍近い重さ)でした...。本来の目的だったノートPCへの充電は問題なくでき、充電も早いので満足はしてます。