ROMOSS Sense 8+ 30000mAh 18W Fast Charge Type-C PD Portable Power Bank EXPIRED

Quote from Slimeyface : There are people in the other threads for this model that have reported that the actual battery capacity is lower than 30k mAh. Does anyone have any recent first-hand experience with this or testing one of these?

That's true for most of these battery packs. I'd like to know by what metric though. Did they actually open it up to see the capacity of the cells they use? If so, that would be misleading and false advertising. However, if they simply tried to charge their device and got less total energy than expected, that is not necessarily false advertising since all battery packs lose some energy in the charging process.

EDIT:

I just read one of the critical reviews. I've pasted it below for reference. The problem is they are not taking into account the actual energy capacity of the battery. They are simply assuming mAh can be converted between his MacBook and the battery pack and the iPad which is incorrect. The batteries in the MacBook are 3S which means they have a nominal voltage of something like 11V while these battery packs are 3.6-3.7v. So at least for this one, it is simply the user thinking they're smarter than they are. I mean, does he really think a $35 battery pack that is the size of two smartphones will be able to charge his laptop 7 times?? He must be lying when he claims he has a 20k mAh battery that can charge his macbook pro 4 times. That would break the laws of physics and would also not make sense why laptop manufacturers don't just put bigger batteries in their laptops if they can be so cheap and so small.

Quote : I bought 3 of these. 30,000 mAh is 30 Ah (for reference). My MacBook Pro battery has a 4278mAh battery. From complete 0% to 100% this battery pack should charge my MacBook Pro more than 7.0126 times. But it only charges it to 100% 1 time, and then gets to about 70% the 2nd time before it is dead. The description says it will charge an iPad Mini 4 times, but at 30,000 mAh. it should charge it more than 3x's that amount of full charges. All 3 of these that I bought charge/discharge exactly the same. For reference I have a 20,000 mAh pack and it charges my MacBook Pro 4 times fully, with enough left for my iPhone and iPad before dying. So, like many other batteries on this site, 30,000 mAh is not truthful. *I bought a battery a few months ago that claimed it was 26,800 mAh, and when I hounded the seller because I knew that was not possible, he immediately took the product down and told me it was actually 8000 mAh. You have to be very careful when buying, as sellers will put whatever they want in the description, and that stinks. All 3 of these are going back.

Something to keep in mind for those who would take this flying, it has 111WH printed on the battery which is more than the 100wh limit for carry on before you are technically supposed to get airline approval for. Of course YMMV on whether TSA will actually check closely, but potentially more hassle to bring something this large when flying.

Quote from Slimeyface : There are people in the other threads for this model that have reported that the actual battery capacity is lower than 30k mAh. Does anyone have any recent first-hand experience with this or testing one of these?

Bought mine back in November. Tested it twice in a row (full charge and discharge). I got about 26k after any boost conversion losses. This is pretty good in my book.

Quote from jdn : Sent back two as they did they same issue. Once my phone was charged, the battery turns off and then my phone discharges. I'd wake-up with 87% sometimes. Even my cheapo chargers keep my phone at 100% until they give it up.

This problem surfaces primarily with iPhones cause when it has optimized charging enabled it briefly stops at 80% which then the power bank thinks it's done and shuts off a few minutes later which sounds like what you're experiencing.

Quote from Jahlapenoez : Something to keep in mind for those who would take this flying, it has 111WH printed on the battery which is more than the 100wh limit for carry on before you are technically supposed to get airline approval for. Of course YMMV on whether TSA will actually check closely, but potentially more hassle to bring something this large when flying.

'Getting approval' is misleading. Northwest and delta Airlines allow 1 per person per their web site . No 'getting approval' required

Got three on the last deal, followed instructions, drain it first before the first charge, charged fully the first time, second time it wouldn't charge at all, using usb-c, micro, lightning cable using different chargers. Two out of three don't work anymore. The third one is fine so far, I might return knowing the first two went bad quickly.

Delete (someone beat me to the punch on the TSA battery capacity issue :-P ).

Quote from upsidedownfunnel : That's true for most of these battery packs. I'd like to know by what metric though. Did they actually open it up to see the capacity of the cells they use? If so, that would be misleading and false advertising. However, if they simply tried to charge their device and got less total energy than expected, that is not necessarily false advertising since all battery packs lose some energy in the charging process. EDIT: I just read one of the critical reviews. I've pasted it below for reference. The problem is they are not taking into account the actual energy capacity of the battery. They are simply assuming mAh can be converted between his MacBook and the battery pack and the iPad which is incorrect. The batteries in the MacBook are 3S which means they have a nominal voltage of something like 11V while these battery packs are 3.6-3.7v. So at least for this one, it is simply the user thinking they're smarter than they are. I mean, does he really think a $35 battery pack that is the size of two smartphones will be able to charge his laptop 7 times?? He must be lying when he claims he has a 20k mAh battery that can charge his macbook pro 4 times. That would break the laws of physics and would also not make sense why laptop manufacturers don't just put bigger batteries in their laptops if they can be so cheap and so small.

I think you are correct. Thank you!

Quote from SteveOH99 : In 4 1 even if it doesn't last too long.

i have one and it has been a workhorse. paid about 30 or it, i think. its big and bulky, but its awesome for weekend camping trips. i think youll be pleased. the nice thing is, no matter what charger wire i grab first, i can charge it with. micro, usb, lighting. tempted to snag another to give to my gf since she is always stealing mine, but i just bought a truck and told myself i need to not be buying stuff unless i needed it.

Quote from Peerless_Warrior : This guy is losing a whopping 13% over night. I've owned Android and Apple phones, never heard of such a thing. If their phone isn't ancient, I suspect a rogue app like Facebook or Instagram is killing the battery.

Not only that but this guy is using a mophie battery case lmao

Has anyone harvested the batteries out of one of these?

I bought this last time and the charging time was slow. Even using USB C to USB C my S20 would show regular slow charging. On top of that this is very heavy so I ended up returning it.
The cheap Omars one I bought a while back charged faster.

Quote from ketchupboy_123 : Would this charge a laptop 100%?

No, likely not. It doesn't seem to charge my Macbook pro correctly.

Quote from idiggplants : i have one and it has been a workhorse. paid about 30 or it, i think. its big and bulky, but its awesome for weekend camping trips. i think youll be pleased. the nice thing is, no matter what charger wire i grab first, i can charge it with. micro, usb, lighting. tempted to snag another to give to my gf since she is always stealing mine, but i just bought a truck and told myself i need to not be buying stuff unless i needed it.

Put an extra one on the truck ! I have one constantly charging in all my vehicles

Coupons available on a number of their other chargers (e.g., https://www.amazon.com/dp/B07WW74MYF/ref=emc_b_5_i?th=1 [amazon.com], which is a similar charger with a digital display), though I'd consider this posting to have the best deal.