Lenovo G560 Battery

In the residential solar PV system market, there are 2 types of systems available to the customer: one which uses devices called "micro inverters" with each solar panel, and the other which uses devices called "power optimizers" with each solar panel, and then also has to have a device called a "central inverter" for all the power optimizers to pass their energy through. It is this single device which is the crux between the 2 systems - one being a completely decentralized system and the other being a centralized system. With a centralized system, the failure of the central inverter will bring the whole system down, but with a decentralized system, a failure of any micro inverter will just cause the loss of a single panel in the system while the rest of the system continues to function fine. What customer out there wants to find out that there system is down and then has to deal with getting it repaired? What is the length of time the system will be down for? Will they have to find out that there is a problem with their system by receiving an electricity bill which is triple from what they normally are used to receiving?

Since 2006, Enphase Energy's (NASDAQ:ENPH) main product has been a device called a micro inverter, a device invented to improve the fault tolerance of the solar PV system so that there would not be a single point-of-failure, and customers would never have to deal with their solar PV systems being completely disabled for an unknown period of time. Enphase is now in its 5th major revision of its micro inverter device (1st - M175/released 2008, 2nd - M190/released 2009, 3rd - M215/released 2011, 4th - M250/released 2013, 5th - S280/released 2015). Enphase's product history alone is a statement to both product improvements and maturity - other micro inverter manufacturers such as SMA (OTCPK:SMTGF), ReneSola (NYSE:SOL), Enecys, or Chilicon Power cannot compare, for Enphase was the first company to successfully commercialize the micro inverter.

When you’re away from a power outlet, there are a lot of things you can do to increase your laptop’s battery life, such as turning down the screen brightness, not playing games or shifting to a more efficient power profile.

But few people consider the power demands of specific websites, and, according to Finnish software developer Santeri Paavolainen, there are some major offenders you need to watch out for. Paavolainen took a 2013 Apple Retina MacBook Pro, with screen brightness set to 50 percent, and used Google Chrome (with Adobe Flash Player disabled) to visit major English-language websites, including Forbes, New Scientist, The Guardian, The New York Times, Google, YouTube and the BBC, while recording the power draw while displaying each site.

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He found is that low-power sites (consuming around 10 watts), which included Google, Forbes and the BBC, drew less than one-quarter of the power sucked down by high-power sites such as that of The New York Times, which Paavolainen measured at just under 50 watts -- not much less than an ordinary incandescent light bulb.

While Paavolainen refrained from pointing out specific causes for the New York Times website's inefficiency, he was surprised to discover that video-streaming sites such as Vimeo and YouTube, which are often blamed for taxing batteries, required 50 percent less energy than did the Times' site. Fifty watts is often enough to raise the temperature inside your computer, which causes the fans in your computer to spin up, leading to increased noise and using up yet more battery life.

If you consider the millions of people who visit the New York Times site every day, the wasted power starts to add up quickly. Not only are inefficient sites a drain on your computer’s battery, but if left unchecked, they could add a substantial amount to global electricity usage.

Cheap phones and computers aren’t as capable or as exciting as high-end phones and computers. We tend to focus on the expensive ones here because they’re where new tech usually shows up first, but plenty of people are buying based mostly or entirely on price and not on features.

For people who don’t have $400 or $500 to drop on a laptop—more or less the minimum amount we’d recommend for anyone looking for a primary machine—there are computers like HP’s Stream 11. We came away pretty impressed by this $200 11.6-inch laptop when we reviewed it last year, and now HP is back with a follow-up that tries to retain what made the first one good while addressing a few of its flaws. More impressively, the company does this without driving the price up.

This is still a niche laptop. $200 just isn’t going to buy you a powerhouse. But it’s a solid upgrade to the first model, and it’s a worthy Windows-based competitor to most budget Chromebooks out there if you’re just looking to do some basic computing.

The new Stream 11 looks and feels a whole lot like the old one, which is mostly a good thing. The keyboard and general build quality still punch way above the $200 price point—it’s all plastic, and it’s a bit on the chunky side, but it feels like it could take some punishment, and the bright colors and the patterns used on the palmrest give it personality that many budget laptops lack. The key spacing is comfortable, and travel is surprisingly good. It’s too much to ask to get a backlit keyboard at this price, but it’s really the only thing that’s missing.

And while the ports have moved around a little (they’ve moved toward the front edge of the laptop instead of the rear edge, and they’re spread out more evenly across both sides), you’re still getting the same basic stuff. There’s one USB 2.0 port, a headphone jack, a USB 3.0 port, a full-size HDMI port, and a microSD card slot rather than a full-size SD card slot. Moving the ports to the front of the laptop makes sense for most of them since they become more easily accessible, but it does seem like it would be a bit awkward to have to connect an external monitor or TV to the front of the device rather than the back.

There are three major weak points, all of which limit the laptop’s potential even though they’re forgivable for the price. The first is the screen, which is a 1366×768 TN panel. That resolution and density level is acceptable in an 11-inch screen, but the faded colors, relatively low contrast and brightness, and poor viewing angles are harder to live with.

The second downside is living with just 32GB of internal storage space, which is enough for Windows and a handful of apps and files and that’s about it. Using the microSD card slot to add more storage can be useful, though external cards are typically slower and less flexible than internal drives (it makes me uncomfortable to install apps on drives that can be removed, for example). The storage also uses a relatively slow eMMC interface, which contributes occasionally to slow or inconsistent performance, especially if you’re trying to do a couple of different disk-intensive things at once. Installing large Windows updates like the 1511 update takes substantially longer than it does on a standard SATA or PCIe SSD.

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And finally, shipping with just 2GB of RAM limits what these ultra-cheap computers are capable of. General performance isn’t bad, but modern Web browsers loading modern Web pages is surprisingly memory-intensive, and if you’ve got half a dozen tabs and a couple of apps open you’re probably already pushing the laptop’s limits.

None of this is really intended as a knock against HP, which is making the same cuts that many PC OEMs make when driving a laptop’s price down. There are still lots of good points here, and HP gets the keyboard and a few other crucial things right, which isn’t always the case in laptops that cost three or four times as much. But the small SSD and low RAM, combined with the fact that you can't really open this thing up and upgrade it to address those flaws yourself, limits the potential audience here.

To create this perfect battery, Microsoft is using a variety of different types of battery, machine learning and smart software.Battery advances have not kept pace with improvements in computing components, such as faster processors, higher resolution displays and faster wireless speeds.Today, battery charging on a laptop is controlled by hardware rather than the operating system, which means that it is not as efficient. Hardware alone cannot determine, for example, how a user is using their laptop and in what context or setting to give the proper charge needed. Microsoft researcher Ranveer Chandra points out that people use their devices for different tasks, each with different battery consumption needs. For example, viewing web pages and editing Word documents may have less battery impact than editing videos or performing complex data analysis.

Batteries in computing devices should address these different needs, Microsoft claims. Microsoft's goal is for the laptop to understand a user's immediate needs and provide a fast or more sustained charge.Taking the software approach

By moving the battery charging controller from hardware to the operating system, Microsoft is taking a machine learning approach, not unlike what Google-owned Nest is doing for connected homes. By learning when users perform certain computing activities, the OS will be better able to determine what kind of charge is needed.