Quotulatiousness

September 29, 2013

Unplugging your laptop to give your battery a longer working life

Filed under: Technology — Tags: — Nicholas @ 11:53

In Wired, Roberto Baldwin says you shouldn’t leave your laptop plugged in all the time:

In order to squeeze as much life out of your lithium-polymer battery, once your laptop hits 100 percent, unplug it. In fact, you should unplug it before that.

Cadex Electronics CEO Isidor Buchmann told WIRED that ideally everyone would charge their batteries to 80 percent then let them drain to about 40 percent. This will prolong the life of your battery — in some cases by as much as four times. The reason is that each cell in a lithium-polymer battery is charged to a voltage level. The higher the charge percentage, the higher the voltage level. The more voltage a cell has to store, the more stress it’s put under. That stress leads to fewer discharge cycles. For example, Battery University states that a battery charged to 100 percent will have only 300-500 discharge cycles, while a battery charged to 70 percent will get 1,200-2,000 discharge cycles.

Buchmann would know. His company Cadex sponsers Battery University. The site is the go-to destination for anyone interested in battery technology. And it’s not just constant power that shortens your battery’s life. While batteries degrade naturally, heat also accelerates the degradation. Extreme heat can cause the cells to expand and bubble. Kyle Wiens of iFixit told WIRED: “Too much heat to the battery over time, and the battery isn’t going to last as long.”

You can battle this degradation by keeping the lid open and your laptop out of your actual lap while using it.

Portland’s tainted $2 bills

Filed under: Business, USA — Tags: , , — Nicholas @ 11:32

Last year there were a large number of red-stained $2 bills circulating in Portland, Oregon. Mary Emily O’Hara investigated the situation:

The manager at the McDonald’s on Northwest Yeon Avenue glanced at the money in the customer’s hand, a $2 bill that looked as if its edges had been dipped in blood. He grew tense, shook his head and turned away.

“Oh, no,” he says. “We’re not allowed to accept those.”

McDonald’s employees had seen the mystery money before — crimson-stained, smeared, always $2 bills — as have food carts, bars, retail stores and other businesses across the Portland area.

The bills have amused some people and alarmed others, who aren’t sure if the stains come from real blood, if the cash is counterfeit, or if the bills were marked by an exploding dye pack during a bank robbery gone wrong.

Thousands of these tainted bills are in circulation around the city, but their source is no longer a mystery: They’re a marketing gimmick for Casa Diablo, a Northwest Portland strip club that is taking U.S. currency and smearing it with blood-red ink.

You’d think defacing the currency would be a problem for the government … and it is:

But the feds have taken a dim view of Zukle’s actions: It’s against federal law to deface U.S. currency with the intent to make it unusable.

WW has learned Zukle and Casa Diablo are now under investigation by the Secret Service. Jon Dalton, resident agent in charge of the Secret Service’s Portland office, tells WW the fact the bills are being rejected show Casa Diablo’s inking of the money violates federal law.

Dalton says his office has told Casa Diablo three times to stop handing out the tainted bills. He also says his office has prepared a cease and desist order and is consulting with federal prosecutors about criminal charges. (WW has also learned the FBI paid the bar a visit in February.)

H/T to Marginal Revolution for the link.

SWATting is not funny

Filed under: Law, Media, USA — Tags: , , — Nicholas @ 11:16

Patterico on the “funny” SWAT raid at Corey Feldman’s home:

My usual admiration for the way TMZ gets these stories every time is negated by their sniggering. I don’t even feel like throwing them a link. You can Google it.

The headline of their post? “COREY FELDMAN SWATTED … But It’s Kinda Funny.”

[…]

TMZ calls the footage “hilarious.” I find that description not only callous but entirely inaccurate. But maybe it’s different for me, given my own experience. When I watched the clip, I got flashbacks. My heart started racing as I literally felt the adrenalin flow. I don’t see how anyone can watch this, imagine the events that preceded it, and find it “hilarious.”

The updated and noncomprehensive roll call of the SWATted: Corey Feldman; Paris Hilton (again); Miley Cyrus (again); Khloe Kardashian and Lamar Odom; Anderson Cooper; Magic Johnson; Mike Rogers; Wolf Blitzer; Ted Lieu; Erik Rush; Ryan Seacrest; Russell Brand; Selena Gomez; Justin Timberlake; Rihanna; Sean Combs; Paris Hilton; Brian Krebs; Clint Eastwood; Chris Brown; the Jenners and Kardashians; Tom Cruise; Simon Cowell; Justin Bieber; Ashton Kutcher; Miley Cyrus; Aaron Walker; Erick Erickson; Mike Stack; and me.

Whoever was doing this was quiet for a while, but they seem to have awakened.

This kind of “prank” is very likely to get someone killed. That’s something I could never refer to as “hilarious”.

Royal Navy carrier operations without carriers

Filed under: Britain, Military, USA — Tags: , , , — Nicholas @ 11:01

Strategy Page on the Royal Navy’s need to keep their carrier operation knowledge up while they wait for the first of the two new aircraft carriers to come into service:

These two decisions [switching to catapult operation, then reversing the switch] cost the Royal Navy about $115 million in additional expenses, which is a small part of the cost growth of the two carriers (from $5.8 billion in 2007 to over $8 billion now). The size of the ships has also grown, from 40,000 tons in the first plan (late 1990s), to 58,000 tons when construction started, to 70,000 tons now. There won’t be much more weight increases because the first ship has had its hull largely completed and will leave dry dock next year. Sea trials are planned for 2017 and initial flight operations in 2018. Commissioning is to occur by 2020. Construction on the second carrier (the Prince of Wales) began in 2011. These are the largest warships ever built in Britain and require the efforts of some 10,000 people in 90 companies and 6 shipyards (for building sections of the ships as well as other components).

There are some other problems that required more innovative solutions. For example, in 2011, the Royal Navy retired all its Harrier aircraft and the last aircraft carrier that the Harriers operated from. That presented a problem, as the first of two new carriers won’t enter service until the end of the decade. The admirals knew that once the new carrier (Queen Elizabeth) entered service a new generation of pilots would have to be trained to take off and land on a carrier. While the Harriers could land and take off like a helicopter, they often took off (via a “ski jump” flight deck) so they could carry more weight (especially bombs) into action. To deal with this Britain will have four of its naval aviators serve on American aircraft carriers over the next decade, to maintain Royal Navy knowledge of how pilots operate jet aircraft off carriers. The British naval officers will learn to fly F-18s in order to do this. While Britain and the U.S. regularly exchange fighter pilots, this is a special case. The British know from experience that it’s easier to train new pilots with experienced Royal Navy carrier pilots. Thus the need to maintain that experience by having British aviators flying F-18s off American carriers until the new British carriers arrive.

Powered by WordPress