We have seen plenty of portable battery packs, right? All sizes and prices. So, what is it that makes Long special? Let’s start with its capabilities: this thing has 36,000 mAh of juice inside. To put that into perspective, a Samsung Galaxy S7 has a 3,000 mAh battery.

I have used such large batteries in the past. My favorite happens to be the LUXA2 P-MEGA, which has a 41,600 mAh battery inside. The only thing is that Luxa2’s battery is huge. It literally looks like it could be one of those compact PC towers. In comparison, the Long battery pack is still larger than what most of us are used to, yet portable and much thinner than previous competitors.

The inventors say this thing will offer "a few days” of charging, which is completely believable. And don’t think it can only handle smartphones and tablets. The Long protable charger is actually designed to power up laptops and other larger devices.The surprises don’t end there. Wait until you hear this – the darn thing is going to be free. The guys at Long are hoping this will be a distribution item, as opposed to a retail product you can just go and buy. This means that, if all goes according to plan, some laptops will probably come with one of these.

But of course, this is a crowdfunding campaign, so there is a price right now. You can get a Long battery pack for as low as $40, which is really a steal for what you are getting. Their $10,000 goal is not close to being met yet, but the Indiegogo campaign is new and still has 2 months to go. Will you be signing up?OEMs are building some impressively small computers these days, but not many of them pack an entire PC into a package the size of a Nintendo DS like this one does.This is the latest amazing project to come from Chris Robinson over at NODE. It’s basically a miniaturized laptop — it has a full-color LCD display, QWERTY keyboard, and a battery — built around a Raspberry Pi 2 board.

While it does look quite a bit like a modified Nintendo DS, it was actually built entirely from off-the-shelf parts. The case is made from two plastic 2.5-inch external hard drive enclosures, which can be purchased for a few bucks on Amazon and a bunch of other websites.They provide just enough room to cram in all the parts, though quite a few hardware modifications had to be made first. The Raspberry Pi had to be stripped down to its minimum thickness, which meant using a soldering iron to remove the USB, HDMI, and Ethernet ports, the GPIO pins, camera headers, and the composite video output.

Replacement ports were then wired in and inserted into openings that were cut into the case with a small hacksaw blade. The keyboard had to be modified, too. It came with its own battery, but that was removed and a voltage convertor was added so that the keyboard and the Raspberry Pi could draw power from the same source.This finished product cost about $120 to build and runs Raspbian and any ARM-friendly apps you can throw at it. Oh, yeah, and it also makes a pretty awesome portable emulation machine:

When talking about laptops, Linux is known for poor battery life. A laptop running Windows 10 might go on up to 8 hours, but the same machine will find it hard to complete even 4 hours on Ubuntu. Of course, Linux can be very power efficient if tuned perfectly with the hardware, but running it out of the disc means you will have to do some tweaking on your own to increase battery life in Ubuntu.

Buying a powerful laptop doesn’t mean that you need that power always. Taking it easy on the processor can help you get more battery life out of the machine. Go to ‘System Settings’ and click the ‘Power’ icon. You can then adjust the power settings as per your needs.

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It is a known fact that Bluetooth is a big battery drainer, even with Linux. So whenever you aren’t using Bluetooth, just turn it off. You can do so by clicking on the Bluetooth icon in the system tray and switching the slider "off”.If you aren’t using WiFi, just turn it off, as it’s a battery drainer just like Bluetooth. To do this, click the ‘WiFi’ icon in the system tray and turn it off. Switch it on again only when you need it.

Increasing the brightness of your display demands more power, so it’s obviously good for the battery life to bring down the brightness level. You will either find brightness control keys on your laptop keyboard, or you can do that by going to System Settings > Brightness & Lock and then adjust the slider as desired.

Each USB drive, smart phone, and SD card you have connected to your laptop sucks on the power. So you must disconnect any external devices that are not in use. Of course, eject the USB drives safely by clicking on the eject button given for the devices.

Running apps use RAM and CPU, and some of them also keep the hard disk awake, even though you might not be using them. Such apps sit in the background and sip on your battery, so make sure you quit them completely.It takes up a lot of battery to watch flash video on Linux laptop. Of course, it’s not that bad, but it does make a difference when you are trying to increase the battery life. Try using a browser that shows flash content only on demand, like the Firefox browser.

Solar panel supplier Renogy today announced an Indiegogo campaign to raise development money for a mobile solar generator that can charge in three hours and produce 900 watt-hours of power, enough to run a refrigerator for eight hours.Renogy's Lycan Powerbox also features an interchangeable lithium-iron phosphate battery that allows you to extend the generator's power life.

With a pre-order price of $1,500, Renogy is charging a hefty premium for the clean solar power provided by the Powerbox. Gas-powered generators with 1,500 watts of power, enough to run refrigerators and televisions, can be purchased anywhere from about $150 to $600. And, the Powerbox will retail for $1,800 once it begins shipping in August.

Additionally, you'll have to purchase Renogy's solar panel to charge the generator's battery; that's an additional $200 for each panel. (They are selling a bundled flexible solar panel for the pre-order price of $100.)

Using a single 100-watt solar panel, the Lycan Powerbox can fully charge in nine hours. With two solar panels, it can charge in four-and-a-half hours, or in three hours with three solar panels. The Powerbox can also charge in seven-and-a-half hours by plugging it into a standard wall outlet.Renogy's Indiegogo campaign has raised more than $25,000 toward a $75,000 goal in the first day of a 30-day project.

The generator's lithium-iron phosphate batteries are rated to last up to 2,000 cycles (one cycle equals a full charge and discharge).The generator's 300-watt capacity can power an LED flat screen TV for 11 hours, a laptop for 8.5 hours or provide 120 charges for a smartphone, according to Renogy.

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"Unlike standard batteries, you can keep The Lycan powered for longer periods of time with no risk of battery depletion. Our worry-free battery means you don't have to make sure it's fully charged every three months," Renogy stated in its marketing material.The Powerbox, which weighs 60lbs and measures 18-in x 10-in x 13.1-in, is waterproof and comes with wheels for transporting it. It it safe to use indoors during emergencies as a way to reduce energy-related expenses, the company said.

The generator comes with an LCD display with information about available capacity, a DC input, three 5V USB ports, a 12V car charger output socket, a 12V DC output socket and three 110V AC outputs (the standard voltage for a wall outlet)."Our vision has been very clear, we want to simplify solar power by making it affordable, reliable and easy to use," Yi Li, CEO of Renogy, said in a statement. "We need to impact the world through clean and safe energy products that are appealing and plug-and-play."

The Samsung Galaxy S7 Edge is a phone I'd hate to have had to make. Its predecessor was a multi-award-winning phone, simply because it packed all the power of the 'normal' Galaxy S6 and yet... that curved edge. I wasn't alone in loving it, whipping it out proudly whenever possible.But that was last year, and the world is bored of the curved design. We've seen it. It's been done. So what can Samsung do to make the new phone a real step forward?

Well, unlike what it's done on the Galaxy S7, which looks (initially) like last year's model, the changes on the S7 Edge are brilliant, adding a zest to a design that could have quickly become tired.The screen is larger, yet somehow the phone doesn't feel too much bigger in the hand. The rear of the phone is now curved too, making it sit nicely in the hand. It's waterproof. There's a microSD card slot. There's so much power in there I'm pretty sure I could strap it on the back of a speedboat and make my way across the Atlantic.And that's even more possible because the battery – such a disappointment on last year's S6 phones – is boosted massively too, giving us a handset that's able to last over 24 hours between charges.

All this comes at a cost obviously, and a pretty hefty one. In the UK that cost is £640, while in the US you're looking at a huge $299 on contract. In Australia, the Galaxy S7 Edge attracts the highest price for a Galaxy yet: AU$1,249 for the 32GB version.What it misses is the clever elements that Samsung's used on the Edge. The display curves further away into the sides of the phone than ever before, which means that even though you've got a phablet-sized display, the phone is as compact as possible.

Place it side by side with the iPhone 6S Plus and you'll see what I mean. The amount of bezel used above and below the display on Apple's phone is almost laughable, especially when you compare it to how tightly packed everything is on the S7 Edge – and the Samsung has a much, much larger battery.One of my favorite parts of the design upgrade on the S7 Edge comes on the rear. A process called 3D Thermo Forming – which sounds like it's been named by a sentient marketing machine – enables the brand to curve the rear of the phone into a single metal rim that runs all around the edge.

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