http://www.akkusmarkt.com

November 16, 2015

Asus Eee PC 1005P Battery

All batteries have a mAh (milliampere hours) rating, which indicates how much power the battery can deliver for an hour. For instance, a 1000mAh rated battery can deliver that level of power for one hour of use. The practical upshot is that the higher the mAh number, the longer the battery will last. To work out how long a battery lasts for you simply divide the device's power usage by the mAh rating of the battery pack, and that figure is how many hours of power it can give you.

Zendure A8
Zendure's A8 Pro gives you 24000mAh of juice, and it looks cool to boot
In addition you will also see battery packs and chargers rated at 1A or 2A â€“ this shows their capacity in Amps. Most smartphones charge at 1A, with tablets using 2A. If you are going to charge these devices with a third-party charger, it's worth checking the rating to ensure you get the same charging performance as you have experienced with their dedicated chargers.

The selection of battery packs is wide-ranging indeed. However, not all battery packs are the same, so it's important to match your needs to the right battery. When choosing the right battery pack, ask yourself these questions:

Which devices do you need to power?
How long will you be away from mains power?
What kind of recharging connector do they use?
Are the weight and dimensions of the battery pack important?
How much power do you need to carry?
At the heavy-duty end of the battery pack market is the EC Technology 2nd Gen Deluxe 22400mAh, and it offers masses of battery power, but it's heavy at nearly 450 grams (though slim with a thickness of 22mm). Or the Zendure A8 Pro offers 24000mAh in a 4cm enclosure weighing 480 grams.

Of course making sure you have enough power for your phone, laptop or tablet is your priority, but there are a number of peripherals that can also be powered without access to a mains supply.When you need to print on the move Canon offers the Pixma iP100, a compact inkjet printer that runs completely off battery power. The HP Officejet H470b is a compact printer that can run from mains, battery or USB.The discovery, published in the journal Nature Communications, addresses a key factor in degrading the performance of lithium-ion batteries, the fact that their electrodes expand and shrink during each charging cycle, a process that consumes lithium.

The researchers said they have developed an electrode made of nanoparticles with a solid shell and a "yolkâ€ inside thatâ€™s isolated in such a way that it can expand and contract without affecting the shell. The technique can greatly improve cycle life, as well as boosting capacity and power.

The electrodeâ€™s nanoparticles contain an aluminium yolk and a titanium dioxide shell, resulting in a component whose "skinâ€, or solid-electrolyte interphase (SEI) layer, is more stable, meaning it doesnâ€™t consume lithium in the way that current batteries do, the researchers said."We made a titanium oxide shell that separates the aluminium from the liquid electrolyteâ€ between the batteryâ€™s two electrodes, MIT professor Ju Li said in a statement.

Li, who worked with three others from MIT and three researchers from Tsinghua, said the method was a "chance discoveryâ€.In laboratory tests, the electrode gave more than three times the capacity of stadard batteries using graphite anodes at a normal charging rate, according to Li. The lab tests found that the battery retained a high charge capacity after hundreds of recharging cycles, he said.Aluminium is a low-cost material and the teamâ€™s method could be easily scaled for industrial-level manufacturing, Li said. The team said it has successfully tested fuel cells using an aluminium-titania (ATO) anode, or negative electrode, with a lithium iron phosphate cathode, or positive electrode.

Dell and Toshiba both offer varying levels of processing power with their new Chromebooks. I'll make that part of the decision easy for you: The only models you really need to consider are the base-level models I mentioned at the start of this review -- the $429 Dell Chromebook 13, which has an Intel Celeron 3205U processor and 4GB of RAM, and the $330 Toshiba Chromebook 2, which has an Intel Celeron 3215U processor and 4GB of RAM.

(On the Toshiba, the specific model you want is the CB35-C3300. Since last year's device is also called the Chromebook 2 -- and appears almost identical in outward appearance -- it's worth double-checking to make sure you're looking at the current model and not the older version.)

Those almost-identical setups are more than capable of handling even the most demanding needs -- like my own anything-but-average style of working, which tends to include frequent switching between as many as 15 to 20 simultaneously open tabs. I've used both systems from morning to night in that manner and things have been consistently smooth and snappy, without a single slowdown or sign of lag on either device. Both laptops are fairly quiet during use, too, and neither gets especially hot.

(Technically, Toshiba's processor is a slight step ahead of Dell's, as it has a higher operating frequency, but don't read too much into those sorts of spec-sheet details. In terms of real-word performance, the laptops are essentially the same -- even with a direct side-by-side comparison.)

For the vast majority of people, upgrading to a model with a more powerful chip or additional RAM isn't going to make enough of a noticeable difference to be worth the extra cost. If you want to spend more money -- especially in the range of $600 to $900, as Dell's higher-level configurations climb -- you'd be better off bumping up to the high-end Pixel and gaining the top-of-the-line hardware, design and display it provides (all of which will be far more meaningful than the added processing power alone in day-to-day use).

In the configurations I'm reviewing, both laptops have 16GB of internal storage space along with a slot for external storage (regular, mini or micro SD on the Toshiba and -- somewhat strangely -- micro SD-only on the Dell). They both also include 100GB of Google Drive cloud storage for two years, which would cost about $48 if you paid for it outright.