ROMOSS 60,000mAh Large Power Bank, High Capacity Portable Charger 22.5W USB C Fast Charging, Long Lasting External Battery Pack with 4 Outputs & 3 Inputs for iPad, iPhone, Samsung, Switch and More

The ROMOSS 30000mAh Power Bank PEA30 is an impressive product that is definitely worth owning. Its large capacity makes it perfect for powering up devices when you're on the go or when you need to have backup power available. One of the best things about this product is that it can live up to its claims. It delivers a ton of power, and it does so flawlessly.I've been using this power bank primarily to power up an RGB office chair, and it has worked flawlessly for that purpose. The chair can stay lit up without the need for a wall outlet, which is really convenient for an office chair with a cool RGB effect. I've also used it as a bucket to hold thunderbolts when I need power somewhere that power isn't readily available, and it has performed perfect in that regard as well.Another great feature of this power bank is the LCD screen that shows you exactly how much energy is left in the device. It's a simple, yet effective way to keep track of your power levels, and it's something that I find really useful. I don't need to look at blinking lights and assume it has 90% battery life versus 80%. It simply states "100" at full charge and starts counting down until it hits 0. That's good to know. It also displays AMPs and VOLTs with usage by pressing the button on the side.If I had to complain about anything with this product, it would be the instructions that were provided. They were lacking in detail from what I remember and didn't provide much guidance on how to use the device. However, it was pretty easy to figure out how to charge the power bank just by looking at the icons on the device. I didn't really try to study the instructions either so it could just have been me.I also found the black 6-inch USB C cable that comes with the product to be kind of subpar. It doesn't seem to carry a lot of energy, and when I tried to use it to fast charge my cell phone, the charging rates on my cellphone were really slow. Like really bad. It's better to invest in a better USB C 100 watt cable to get more energy into this product faster. I've included a decent cable in the links below that works good for transporting heavy power to whatever USB C you plug into it.That being said, I charged the power bank a few days ago and used it for some pictures of another Amazon product, and it lost no energy between uses and sitting idle. It seems to be pretty good at holding on to its charge without any issues. This gives me peace of mind knowing that if I need to grab it in a hurry, it'll be readily available with multiple days of phone charging before it's completely out of juice.I love owning the ROMOSS 30000mAh Power Bank PEA30. It's practical, well-built, and offers everything that I could ever want from a power bank. Its large capacity and reliable performance make it an excellent choice for anyone who needs a lot of power on the go. It's definitely a product that I would recommend to others who are looking for a high-quality power bank.Supplemental Items (USB C Cable that offers better charging):https://www.amazon.com/gp/product/B0B79QMZBY - Better USB C cable to charge with (100 watt)https://www.amazon.com/gp/product/B0BC1D2WGR - Connectors for USB C cable (recommended)Other items shown (RGB Rod powered by USB):https://www.amazon.com/gp/product/B099DLH3PD - RGB Rodhttps://www.amazon.com/gp/product/B07JZCNPNV - RGB Controller (requires item below)https://www.amazon.com/gp/product/B07GWMX3G3 - USB to SATA Power CableIf you liked the chair (Not recommended but it looks really cool put together):https://www.amazon.com/gp/product/B088LNF2N5 - Chair (poor quality & uncomfortable)https://www.amazon.com/gp/product/B09TKDYXTG - Bottom Chair Base (Recommended)https://www.amazon.com/gp/product/B09D3HRYFZ - Piston (Recommended)https://www.amazon.com/gp/product/B07BLRZTCY - Wheels (Not recommended - poor paint job)

After 3 years of use, this thing is still charging strong!Pros:-Multiple uses per full charge-Charge multiple devices at once-Visual display (Percent Remaining, Bolts, Amps)Cons:-Heavy but needed due to its Mah-Ports are flimsy (USB-C no longer works because the contact has separated with use-Takes a while to charge but amount of charges from device outweighs the time it takes-Amazon could not get me in touch with US customer service to solve. Would pay to repair.

The charger has multiple USB-A ports all QC rated and a USB-C, Lightning charger port AND a micro usb. The power bank can be charged with the USB-C or micro usb.1. Its a brick, and its a bit heavy. I use it in a travel trailer so family can charge up when were hanging out inside so I can spare my trailer batteries. The build quality is all metal - its sleek. This will be great to take on my boat too.On compatible laptops you can power the laptop from the lightning or USB-C port.All I can say is it lasts forever (it seems like) running my laptop off it just browsing the web or watching youtube I got over 3 days of power from the bank. I intentionally killed it when I first got it just charging everything and running everything off it and the thing just slowly drains. It took forever to kill it. Equally it take a lon time to charge but it does support fast charging (9v-12v) from compatible chargers like from Samsung. The best I could do was 27 watts of charging from my best charger.I like it. But its nothing you can easily throw in a backpack, weighs like 4 lbs. Great for camping. If your not going to use it for a long time, discharge it to about 60% so the battery dosent burn out. You dont want to store these fully charged.

I bought this right before a 2 week back country trip. It charged my phone, Garmin InReach, iPad, bluetooth speakers. It worked well.Pros:It has a LOT of battery. I charged it up before the trip and STILL have not been able to drain it. I am trying to fully drain it for the process listed in CONS. It lasted the whole trip and I have been charging my iPad and phone with it since then trying to drain it. It has plenty of USB outputs, 3 USB A and 1 USB C and it charges fast with all ports. It is very energy dense. It is like a brick both in size and weight. It has a lot of battery for the size. My S20 Ultra was charged about 75% last night and it took 4% of the battery to fill it and keep it full overnight. I like the LED display that shows output current and battery percentage left. It held up to camping for 2 weeks just fine.CONS:The instructions say that you need to fully drain the battery and then fully charge it in one cycle to train the BMS so you can get the full battery life. This should not be left to the end user to do. The battery came with 81% on it, which I was not able to drain before leaving. The instructions are limited and I do not know exactly what the side button does. Does it turn it on? It cycles the display, does this change functionality? It does not appear to like low draw devices. It will turn on then back off when using my low draw LED light string and it does not appear to matter which USB port it is in. Could the side button help? The case is has a satin type finish that will scratch, kind of like the Lenovo laptops. I don't care as I am after functionality first, but someone might.All in all, I am happy with this and it will serve my needs well. It has been really good so far and I would recommend this. I will continue to test and do some math to verify capacity. Many are listed in Mah with a nominal voltage of 3.7 (internal battery voltage) and not charging capacity from USB at 5v+. I cannot verify either way yet. I still need to complete the drain and refill process. Either way, it is a really good pack so far and I am glad that I bought it.