For any tech lover or frequent traveller, a power wall is a must-have accessory. 

There are loads of models available, and the latest all support fast charging. 

Other increasingly specialised power banks can tuition laptops, have USB-C ports, and support tech such as Qualcomm’s Quick Charge. 

To help make choosing a power wall easier, we tested 10 models, from affordable to high-end with niche full-length sets.  

A big problem with power banks is that the very shower cells and charging circuitry inside some lesser brands can be of low quality, and not unquestionably provide the rated capacity. However, many power banks tested have batteries that (when new) are giving increasingly than their rated capacity, which helps plane it out. 

How we tested

 We logged the power produced on a static load. Due to efficiency losses, the output topics will be up to 10% less than the rated shower capacity. 

As a comparison, we moreover calculated each power bank’s ‘mAh per dollar’ score to help assess the overall value – higher is better.  

 Dell Power Companion PW7015M 

Price: $179

Charging laptops slantingly USB devices is very useful, but some models are not supported by the ‘universal’ power banks. 

The Dell Power Companion solves that issue, with a 18,000mAh or 12,000mAh (as tested) power wall with dual 2.1A USB ports, as well as palmtop charging. 

The unit plugs in between your palmtop and its PSU, rather than having its own charger. This is a unconfined setup, as it ways the unit is unchangingly charged (though tops off the palmtop first), and automatically kicks in if mains power is lost. 

It comes with both the large and small Dell power tips (and charges from either) – or there is moreover a USB-C version. 

Using a large to small tip adapter, we were moreover worldly-wise to tuition an HP laptop.  In testing, the Power Companion outputted an outstanding 100% of its rated topics via USB. 

The Power Companion is increasingly expensive than most palmtop charging power banks, but is still a must-have purchase for on-the-go Dell palmtop owners.  

 Xiaomi Mi Power Wall Pro 

Price: $69

While most power banks support 5V 2A fast charging, the Xiaomi Power Wall Pro steps it up a notch with Qualcomm Quick Tuition 2.0. 

The tech is only supported on some phones and tablets for now, but allows devices to tuition at 9V or 12V, rather than just 5V 2A. Plane better, the power wall itself can be quick charged with a uniform charger, for quick top ups. 

The unit has a 10,000mAh capacity, and a single USB Type-A port. It moreover has a USB-C connection, but it only works for charging the power bank, not as an output. 

Importantly, it does support passthrough charging, and can plane tuition itself from a phone. The power wall can moreover be used to tuition uniform laptops that use USB-C. 

The Mi Power Wall Pro managed to output a very impressive 99% of its rated capacity. It’s moreover the lightest and smallest power wall tested for the capacity, measuring in at 130 x 75 x 12mm, and weighing just 225 grams.  

Thermaltake Luxa2 P3 Power Bank

Price: $60

Shipping with a snap on specimen for an iPhone 5, the super slim Luxa P3 is moreover quite powerful. The 2,500mAh shower has an spanking-new 2,432mAh available.

While only just unbearable to requite many Android phones a full charge, it will top off your iPhone 5 with power to spare, or increasingly than double your run time.

It moreover has unbearable power to tuition your tablet (albeit not a full charge) and puts out up to 3.67 A - the highest out of our tests.

The sleek little unit is stylish and well-built and comes in woebegone or silver. It comes with a Micro-USB subscription and organiser, but no iPhone cable, so you need to use your existing one.

Huntkey Ezy Go Pocket Size Power Bank

Price: $23

While the lowest topics power wall tested, the slim little Ezy Go still manages an impressive 1,824mAh of real-world charging.

It's unbearable to scrutinizingly fill your iPhone or requite your Android a significant boost. Impressively it can output 2.63 A so can handle your tablet, though not for too long.

It comes with a micro and mini USB multi cable, as well as a pin style plug for your old Nokia. Alimony an eye out as it's often on sale for under $20, making it a bargain.

Kogan 3-in-1 Key Ring Power Bank

Price: $29

With a super portable key ring design, this Kogan power wall has an 800mAh capacity.

That seems tiny, but you get scrutinizingly 100% of the topics and it's unbearable to requite your smartphone up to a half charge.

Just plug straight into a USB port to recharge and handily it moreover has an 8GB wink momentum built in. You can moreover use the unshortened device as a USB charging subscription plane if it's out of power.

It comes in Android (micro-USB) or Apple flavours and included self-ruling shipping.

 TP-Link TL-PB10400 

Price: $49

Rather than a unappetizing form factor, the TP-Link TL-PB10400 has a tall, rectangular shape that measures in at 89mm x 44mm x 44mm and weighs 241 grams. 

While not unconfined for slipping into a pocket, the power wall does sit well in car and bag drink holders. 

Hidden inside is a large 10,400mAh capacity, with four LEDs to indicate the tuition level. 

The power wall has dual USB ports, with one rated for 2A and the other for 1A. It charges via micro USB (and includes a cable), handling a 2A current. 

One handy full-length of the TP-Link is an inbuilt LED torch, which is activatable by holding lanugo the power button.  

In testing, the TP-Link power wall outputted 98% of its usable capacity, and had no problems supplying over 2 amps. It moreover supports passthrough charging, though the side location of the micro USB input makes it nonflexible to tuition in a bag.  

The TL-PB10400 is quite affordable at $49 (shop virtually online), which results in a unconfined mAh per dollar rating.  

 3SIXT JetPak Slim 

Price: $79.95

The svelte but weirdly named 3SIXT JetPak Slim comes in both 8,000 and 4,000mAh capacities. Both have dual USB ports – one that can output 2.1 amps, while the other is rated for 1 amp. 

They tuition via an included micro USB cable, and have an on sawed-off (and wheels power off), plus four LED power level readout. 

The smaller power wall saves you $30, and while we tested both, our results are for the 8,000mAh model. 

The JetPak performed quite well in real-world testing, and we were worldly-wise to use 95% of the rated capacity. Handily, it moreover supports passthrough charging.  

As the name suggests, the 8,000mAh model is very slim at just 10mm thick, but is 150mm long and 75mm wide. Combined with the 195-gram weight, the power wall is easy to slip into a bag or pocket. 

The outer aluminium shell is nice and tough, but will tend to pick up some scratches.  At $79.95, it is not the cheapest power wall for the topics and specs, but gives a decent result.  

 Belkin MIXIT Power Pack 6600 

Price: $69

As the name gives away, the Belkin MIXIT power wall has a 6,600mAh capacity. 

It’s clad in a thick but lightweight aluminium shell that looks great, but is a little prone to scratching. 

On the merchantry end, the power wall has dual USB ports, and a micro USB charging socket. 

The unit supports 5v fast charging, but rather than an individual power rating for each port, they share a maximum of 3.4A. The Belkin power wall can moreover tuition at up to 2.4 amps, and includes a micro USB cable. 

Unlike any other power wall tested, the MIXIT has a $2,500 unfluctuating equipment warranty, just in specimen it has a fault that causes damage.  

The power wall had 97% of its rated topics misogynist in real world testing, and happily outputted the rated current. 

While a little pricier than some of the competition, the unfluctuating equipment warranty gives peace of mind not found elsewhere.  

The MIXIT power wall is moreover misogynist in a 4,000mAh topics for $39.95.  

 Laser Power Wall 10000 

Price: $39

Clad in unexceptionable yellow plastic (or blue, pink and green), the LASER power wall has a large 10,000mAh capacity. The rest of the specs are pretty standard – dual USB ports, with one 1A and the other 2A. 

While the plastic shell does not have the premium finger of metal, it’s got a fairly robust design. Charging is washed-up via micro USB, but only at a 1A rate. 

It’s worth noting that the Laser power wall does not support passthrough charging, and the LED indicators are subconscious under the shell and can be tough to see. 

On the plus side, it does come with a multi-headed USB tuition cable, with micro USB, Lightning and the 30-pin Apple connector. 

In testing, the Laser power wall has a decent 94% of its topics available, and will happily tuition most phones or tablets a few times over. 

Because of the unseemly price, it moreover gives a very good mAh per dollar ratio.  While the price and topics is great, other power banks offer a few increasingly features.  

 Luxa2 EnerG Slim 

Price $29

Wrapped in woebegone fireproof ABS plastic, the Luxa2 EnerG Slim is designed to slip hands into a pocket or bag. 

It only has a single USB port, which is rated to output 1.5A. While less than most power banks, that’s still unbearable to enable a fast charge, and work with electron-hungry tablets. 

When we loaded up the power bank, though, it happily sustained 2.2A.  In testing, we pulled 5,061mAh from the EnerG Slim, which is a unconfined result and goes to show it uses high-quality cells. 

The power wall lives up to its name, as just 9.8mm thick, 63mm wide, 128mm long, and weighing 120 grams. 

The EnerG Slim charges via micro USB, with an 1A input rating and an included micro USB cable. Handily, it does support passthrough charging, and takes well-nigh 6.5 hours to top up itself.  

For those who need uneaten capacity, the Luxa2 EnerG Slim is moreover misogynist with a 10,000mAh rating for $45.  

Sony CPV3

Price: $39.95

Rated as having a 2,800mAh battery, the Sony moreover claims 7.5Wh, which would unquestionably be a 2,000mAh shower - so there is some inflation going on there.

It has a usable topics of 1,927mAh - a poor result for a 2,800mAh shower but an spanking-new one for a 2,000mAh battery.

Don't go looking to tuition your tablet as it only outputs 1.61 A. Rated for 1,000 tuition cycles, if you use it a lot it will probably outlast some of the cheaper models.

 Promate CLOY-12 

Price: $39

Taking a slightly variegated tack, the Promate Cloy-12 has a larger 12,000mAh rating. 

Wrapped in soft touch plastic, the power wall feels tough, and won’t scratch too easily. 

On the merchantry end, it sports dual USB ports, which share a combined maximum 3.1A output current. It charges via micro USB, but only at a slower 1A rate, so takes well-nigh 7 hours to fill when up. 

Rather than a push sawed-off to trammels the remaining charge, a quick shake does the same job thanks to an inbuilt movement sensor. 

In testing, we were worldly-wise to wangle 93% of the rated capacity, which is pretty good considering the price. While it does come with a nice unappetizing USB cable, the power wall does not support passthrough charging.  

Impressively, the Cloy-12 has the highest mAh per dollar rating out of any of the power banks tested. It’s moreover fairly lightweight at 267 grams, and measures in at 120mm x 65mm x 20mm. 

For those who don’t need increasingly wide features, the CLOY-12 is a solid choice.  

 Romoss Solo 5 

Price: $35

Despite an impressive 10,000mAh capacity, the Solo 5 financing just $35. It comes as no surprise then that, in the real world, only 91% of that topics was misogynist – the lowest of the power banks tested. 

The thing is, for the price, that is unquestionably a fantastic result, and gives a very impressive mAh per dollar rating.  

Unlike its metal-wrapped brethren, the Romoss Solo 5 is clad in plastic, which is still prone to scratches. The twin USB ports are conveniently located on one end (great for charging while it’s in a bag), but the micro USB input is on the side. 

The Solo 5 ports are rated for 1A and 2A, and it can tuition at 2A. It includes a micro USB cable, and has a four LED topics indicator. 

The whole kit and caboodle measures in at 138mm x 62mm x 21.5mm and weighs a pretty standard 296 grams.  

For those who require a larger capacity, the Romoss Solo 6 has an uprated 16,000mAh for $15 more.  

 Comsol Palmtop Power Bank 

Price: $149

The stocky Comsol power wall has a huge 20,000mAh capacity, shoehorned into a surprisingly thin metal-clad shell. It’s still pretty large though, at 185mm x 125mm x 15.5mm and weighing in at 562 grams. 

In a somewhat weird move, the unit unquestionably only has one USB port, which is rated for 2.1A fast charging. 

Unlike smaller power banks, the Comsol comes with a palmtop style 19v charger and can reach full topics in just 4 hours.  

The power wall moreover comes with a subscription and variety of connector tips, which indulge it to tuition most laptops – though not MacBooks. 

It’s rated for 19v at 3A, so can replace up to a 65W adapter. Perhaps plane better, the output voltage can be switched to 16v or 12v. This makes it easy to run all sorts of other 12v tech, from modems to lights.  

Via USB, the Comsol power wall has 99% of the stated topics misogynist and could alimony most smartphones going for a week or more.  

 Portable replacement batteries buyer’s guide

• Capacity: A 5,000mAh is a good starting point to get up to two full recharges from a smartphone, but a larger 10,000mAh model is weightier for tablets.
• Passthrough charging: This handy full-length allows you to plug the power wall between your charger and device, and tuition both at once.
• USB ports: Most larger-capacity models have two ports, which is very important if you need to tuition increasingly than one device at a time.
• Input tuition rate: Typically, 1A or 2A (higher is better), this determines how quickly your power wall can tuition itself when up again.
• Fast charge: Power banks supporting currents over 1A helps tuition your device quicker, and is needed by some power-hungry tablets.
• Charger not included: While they all come with a cable, power banks often need to be plugged into an existing charger or USB port to charge.
• Qualcomm quick charge: Only supported by some new phones, this tech allows devices to be charged up to four times faster than normal 5V USB.
• Form factor and weight: With many variegated shapes, some power banks are largest suited to use in bags, or stuff carried around.