ROMOSS Power Bank, 40,000mAh 65W Portable Charger for Laptop, Fast Charging USB C Battery Pack with 3 outputs for MacBook, IPad, Dell, HP, Notebook, Switch, iPhone, Galaxy and More

I use this to run a portable CPAP (no water humidifier) when car camping. Good capacity in a compact package at a decent price. Can sustain 45 watt output.

Used this power bank to run my Starlink Mini satellite internet dish. Fully charged it ran the Mini for just over 6 hrs 30 minutes. Thats 30 minutes longer than another 40,000mah power bank I own, so the capacity of the Romoss is likely not overstated. Like a good lithium battery should, it ran at voltage and amperage acceptable to the power hungry dish right up to 0% before it quit. Nice. It recharged in 2 hrs 48 minutes from a 100 watt GAN wall charger and 100 watt cable, so it had full opportunity to recharge at its rated 65 watts. I haven’t done the math but it feels like that’s pretty good for such a big power bank. The charger was pretty warm! But that’s expected.It has a Lightning recharging port (as well as a USB C charge/recharging port). I’ve never seen that before and think the choice is weird - would’ve liked a second USB C port instead.Overall I really like this power bank and I think for the price it’s pretty hard to beat.The only thing that’s a little misleading is a description on the side of the box that says “Bidirectional fast charging”. It is certainly true you can fast charge FROM IT to devices, and fast charge TO IT from a wall outlet recharging plug, but you CANNOT DO BOTH SIMULTANEOUSLY. I tried this and it immediately switched off the device charging from it and began instead taking the recharge current. Honestly that’s really an Uninterruptible Power Supply (UPS) function that I would only expect from a larger power bank like a Sherpa. So it’s not a hit on the Romoss, but a clarification.

I really love this charger. It has a compact shape with a convenient carrying handle that makes it easy to use the light as a lantern. I previously had a Halo, and it was difficult to carry around. It seems to have good quality construction, and it charges my phone and laptop quickly. It takes a long time for the charger itself to get fully charged, but usually when I’m charging it, I’m not in a hurry anyway.

Update: Had this product 3.5 months. Unit no longer turns on ac or usb ports. Screen does not turn on and does not charge. Your to contact Romoss through their website and glitch does not allow contact form to be sent. Can no longer recommend. Now a 1 star productI like the product. Form factor is good. I have been able to output 160 watts from the AC port. USB ports all work.However, display can be inaccurate and drop very quickly. This is common with some power banks of this style though.The biggest disappointment is the display. It only has percent battery. There is no power, voltage, wattage, time to charge / discharge, etc to show.If this power bank had an improved display this would be a 5 start product

Excellent

It’s the best power bank

This is a pretty big boy and sturdy with metal construction and a weight to match. Due to the capacious 40Ah (~168 watts) it takes a while to charge and discharge. I used my load to discharge at a constant 60w for a few hours to get this one down to 0% as recommended by the manual and charging takes quite a few as well. Not all battery banks can actually deliver or maintain that kind of load without failing so I appreciate when one can. This bank would be great for camping to keep phones charged and can be itself charged by one of those camping solar panels. The light is also a nice touch for car trips or camping.There are a few downsides to this battery bank. Similar to others: a single USB-C port is provided for both charging and powering devices. This effectively prevents it from being used as an inline "UPS" type supply where it can stay always charged while also making sure a connected device doesn't lose power.No charger is provided nor is there a dedicated charging port. I used a 90w laptop charger which got quite hot when charging this bank so I switched to a 120w GAN charger and that still got pretty warm. A little bit of an odor was in the room so maybe that's just part of the "off-gassing" process.Overall, I think this is a great item if you enjoy camping or travelling and don't want to constantly be on the lookout for a charging port. It's too big for an airplane though, just keep that in mind if you are a frequent flyer.4/5 stars: Good with only a couple inconveniences keeping it from greatness.

Can charge iphone 15 pro max 3.5 time. From 0-100%