CELLONIC Ultra Slim 20000mAh Power Bank for Laptop - 4 Port QuickCharge 3.0 100W Powerbank USB C External Battery Pack Portable Charger Compatible for Dell, Macbook Pro, HP, Acer, Surface, Lenovo

While lots of power banks boast large capacities, rarely do they actually support higher voltages and fast charging. With upto a 100w of charging power this Cellonic power bank can supply plenty of power for a lot of different devices.In the illustrated branded box you get the powerbank and small guide. That's it. I would have liked to have seen a USB-C cable included. The powerbank is quite large but relatively slim. So it should fit into most laptop bags. And this is where this really comes in handy. As it can supply upto 20v it should be able to charge most laptop and tablet computers. The display shows voltage, current and capacity. Trying it on a range of devices, including a laptop, a drone and a phone. I saw a range of voltages from 5-20v with current upto 2amps. None of my devices will typically pull more than 45watts. However I was still able to charge mulitple devices together.An impressively powerful bank at a surprisingly reasonable price of less than £60.

For a power bank with a 20000mAh battery, this device is pretty big yet fairly slim measuring just 17.5mm. It has a very solid build with a smooth surface. There are grooved lines on the edges that give it some texture and the Cellonic branding in the centre. The single button on the side activates the small LED display which reads out the battery charge percentage, as well as the voltage and amp data which is interesting, as it allows you to keep track of the power usage of different devices. It also comes with a fairly long and braided USB-C to USB-C cable.It features 2 x USB-C and 2 x USB-A ports offering a total output of 100W which can easily fast-charge phones and other such devices and is also capable of delivering power to a laptop. Using all 4 ports you can simultaneously charge 4 devices which is extremely convenient plus it offers plenty of safety features such as overload, overvoltage and overheating protection as well as short-circuit which offers peace of mind, especially when charging your valuable gadgets.I wouldn't call this compact though, although it is slim it does have a large surface area, but it can be taken with you in your backpack or messenger bag when travelling. It has plenty of juice so it’ll keep you going when the battery on your devices start to drain.

I bought It to travel, and i charges only mynphone and the battery thank stopped to 40%, which doesn't leave too much power for the laptop. Quite dissapointed honestly i had to return it

Exactly what you'd expect, works perfectly and charges both USB-A and C devices quickly without getting majorly warm like some of these battery banks do.I do find that the port selection is great, and this is clearly a new design as it doesn't include the typical Micro USB input as most cheaper banks do, which is a major plus in my eyes.The downsides for me are the size and the price, for this money (69.99 at this time) I would personally buy a power bank from a better known manufacturer, that would be quite a bit smaller at 20k mAh

This is an impressive power bank which manages to combine large capacity and output with great looks. This can be used straight out of the box, mine arrived with an 85% charge and it's also supplied with a heavy duty USB-C cable for charging. There are 2 x USB-A and 2 x USB-C output sockets. The USB-C sockets max at 3 amps, whilst the USB-As go up to 5 amps. Voltage output ranges from 5 V to 20 V.Overall, this is an incredibly impressive and extremely versatile piece of kit which is very useful for charging out and about, not just for mobile devices but for larger item such as laptops. Currently on a special offer which makes it exceptionally good value.I'm really happy with this power bank.

Heavy 100w 2000mAh 4 port power bank not just for lap tops but any device that needs long power back up, this comes with only one USB C lead which for the price I would have expected two other than that this works well and needs fully charging on a slow charger before first use then you can be confident it will give the power when needed see pictures to show size and styleCELLONIC 20000mAh Large Power BankPower Delivery: 100W max.Input: 2x USB Type C (45W)Output: 2x USB C (100W max.), 2x USB A (22.5W)Type-C1+C2 output: 65W+45WType-C+USB output: 65W+22.5WDimensions:162*133*17mmWeight:380g

As can be seen in the attached pictures, this is a large powerbank and gives a detailed picture of its state. My old one just had a light for on and one for empty, but this gives a % charge and the output current and voltage.It supports 9v superfast charge (9.2V and 1.7V = 15.6W), but as far as I can see all the ports have to have the same output, so when I plugged three devices in the voltage fell and the power output (5V and 2A = 10W). I'm not clear whether that is per port though as the display does not specify which output it is showing (all of them?).

This power bank is a slim flat design with type A and type C ports. It has a 20,000mAh battery and supports 100W PD output.Things I liked:- hefty weight at 534 grams (see pics) but this is a good thing as battery cells inside must be substantial- can power up usb type C laptop (upto 100W)- plenty of usb ports available (4 in total)- LED display for battery status etc.Overall, I really like the thin flat design which can slip into an existing laptop bag or sleeve bag without the extra "bulge" showing. A great laptop companion.