Welcome back to Ask TUAW, our weekly troubleshooting Q&A column. This week we've got questions about controlling a PC over the internet, silencing iPhone email notifications at night, replacing a MacBook Pro SuperDrive with a hard drive, printing over the internet, setting iCal as the default calendar, and more.

As always, your suggestions and questions are welcome. Leave your questions for next week in the comments section at the end of this post. When asking a question, please include which machine you're using and what version of Mac OS X is installed on it (we'll assume you're running Snow Leopard on an Intel Mac if you don't specify). And now, on to the questions.

In a previous post about offshore iPhone chargers, a few astute TUAW readers mentioned Monoprice.com as a good source for chargers, connectors, and computer, TV and audio cables. In searching their site, I found a real deal.

The Monoprice Backup battery pack is the simplest of devices. When your iPhone or iPod is running low on juice, just plug this battery pack into the 30 pin connector. You can then either keep running with a fairly large dongle hanging off the bottom of your device, or wait and the battery pack will charge your device in 3.5 hours according to Monoprice (or about 2.5 hours according to my tests).

Yes, there are a lot of battery backups that do this, but how many are sold at US$14.50? You read that right, only US$14.50, and for that you get pack with a capacity of 2200 mAh.

For comparison, the capacity of the iPhone battery is 1150 mAh, so this battery should be able to charge your device twice. Due to my ignorance of the vagaries of electricity, mine winds up charging the iPhone about 1.75 times, which isn't bad at all.

Over the last couple weeks, I've been going back and forth with readers who truly believe that Snow Leopard is reporting battery errors when they have a perfectly good battery. There's even a substantially large thread in Apple's Discussions forums about this topic. I've been notified of that thread many times, accused of not covering real issues, hiding the truth and just plain refusing to believe that it's an issue with the Operating System.

After trudging through all of that, I've determined that it's a whole bunch of hoopla. I'm not saying that some of these people aren't experiencing real issues with the software -- just the sheer amount of complaints in the discussion forums would say there are problems -- but the "Service Battery" complaint doesn't appear to be related to software issues at all.

One of the big differences between Leopard and Snow Leopard is how they report issues with the battery. Leopard didn't report issues in a place where most users would know to check: System Profiler - Power - Health Information. Snow Leopard reports issues directly from your Menu Bar as shown in the picture. This difference caused a real stir in our tips box because many users never knew that their batteries were bad before Snow Leopard. "My battery isn't bad, it worked fine until I installed Snow Leopard" -- Yes, it may have worked fine but that doesn't mean it didn't have issues before the upgrade. Apple just made the problems more noticeable in the OS. In fact, they're helping their users catch them sooner.

Most of the time, people don't realize their battery has issues until it REALLY has issues like 20 minute run-times, random shut downs, the black "x" in the battery icon, etc. All of these are issues we (technicians) use to identify a bad battery. These new battery checks could actually help you find out your battery is bad before the warranty runs out; before it gets to the point of no return.

Genius Bars and Apple Authorized Service Providers now have a special utility that actually reads the health information directly from the battery and can determine why the Operating System says the battery needs serviced. Most of the time the problem will fall into two categories: battery failure or depletion. This diagnostic tool is actually a game-changer in the world of Apple's battery warranty: batteries are no longer automatically covered through the first year. If the battery legitimately fails, they'll replace it free of charge. If you happen to deplete the battery within the first year, you'll pay for a new battery.

Take all of this information with a grain of salt. Apple IS helping us by having the OS show us when the battery fails, but they've also made warranty battery replacements a little more fair on their end. Having blanket warranties for a year probably cost them a lot of money considering it's pretty easy to deplete a battery within that time if you don't take care to keep it healthy.

I've had the battery in my MacBook Pro for 9 months now. I have 245 cycles on the battery, 3-4 hours of pretty heavy usage (without the killer graphics enabled), and 99% health rating according to iStat Pro. I'll leave you with a few tips to help maintain the health of your battery:

• Never leave the machine plugged in all the time. Laptops are meant to be portable. Using it as a desktop that never runs on the battery will destroy your battery life.
• Cycles are your friend. Never letting the battery complete a cycle will greatly diminish your run-time. Try to avoid charging the battery unless it's drained past 30%. Any time the battery drains past 50% and charges more than 50% counts as a cycle. The farther you let it drain before the charge - the better its overall health will remain.
• 30 cycles in a year is not a good thing. ;)
• Let the battery drain completely a few times a week.
• Never let it sit for long periods of time without use. Batteries need to be loved or else they won't love you.

For more information on batteries, check out apple.com/batteries

UPDATE -- There have been a lot of opinions expressed in the comments about the proper care and feeding of Apple laptop batteries, especially the newer lithium ion units. I'm happy to see that this article sparked such a healthy debate. To be clear, my tips here are not directly based on Apple's recommendations. They are driven by my personal experience servicing Apple laptops and Apple batteries for customers, and my own battery health history. For a different take on proper battery care for modern gear, we were pointed to feedback from Marco Ament that's worth a look. If we have electrical engineers or battery designers in the audience that wish to weigh in, we'd be happy to hear from you.

Sometimes, when I see something new, I have to smack myself in the head and think: "Why didn't I think of that?" Remember the old V8 Juice commercials? I just heard about one of these and It's the X-Power1 USB Rechargeable Battery Backup Cable from Xmultiple.

It looks like a USB charging cable swallowed a AA battery. What's inside is a lithium-ion battery with more capacity than built into any current iPhone or iPod. Using this cable, sync or charge your device while the internal cable battery charges. It will take about 3 hours to fully charge. Then when your device runs out of juice, plug in the cable and get power while you charge your device's battery.

I spoke with Alan Pocrass, the CEO of Xmultiple, and found that the information now circulating around the Internet is wrong. If you've already read something about the product, that information was based on a production prototype that will not be be built. The publicity picture is also inaccurate. The cable will work with iPhones, iPod touches and USB-charging iPods only, so earlier iPod owners (those that charge via Firewire) are out of luck.

Keep reading for more specifications...

"My iPhone's been draining awfully fast since I installed 3.0," I commented to a fellow TUAW blogger just a few days after the release of the iPhone 3.0 firmware. At first, I wanted to think it was my phone. But, my iPhone 3G wasn't even 90 days old at the time of the observation and I'd been able to keep it on standby for several days before it needed a charge. Now, I could barely make it through a 10-hour workday before rushing out to the car to hook it up to a power source.

Aaron Vronko of RapidRepair says that this isn't an isolated incident. The iPhone 3G may now deplete its energy supply in roughly two hours, and the first generation iPhone lasts less than a day. Vronko tells Macworld that the cause is most likely push notification placing a drain on the battery's reserves. The issue has also led to complaints on Apple's support forums.

I've definitely noticed the difference. If I leave myself logged into BeeJive IM while I'm at work, my phone drains much faster than it does if I'm logged out. Regular push mail notification from MobileMe doesn't affect the battery level all that much, even with the high volume of e-mail I receive through TUAW. So, to save on the battery for now, I'm avoiding the push applications as much as I can if I don't have a charger within reach.

Vronko believes that the 3.1 release will solve the battery issues.

[Via MacNN]

Not really -- if you really are planning to grill up some meat (or mushrooms and pineapples, they're good too) today or this weekend, you'll need a little more heat than your iPhone will give. But it's true, Apple's little handheld can get nice and toasty when it's really working*, and illustrator Chad Covino made a little Fourth of July BBQ-themed sketch about that very subject. We love it -- very nice work!

My iPhone does get hot, but not so hot I can't pick it up -- usually when I'm running 3D for a longer stretch of time or when the phone is doing some serious calculating like audio or photo editing, I start to feel the heat coming off the back. Batteries are to blame for some of the more extreme problems, however, and that's not a huge surprise, given that batteries in any mobile device have their issues. The good news in that case, however, is that the phone is unlikely to actually explode -- the repair guy Wired talks to says that "a little bit of smoke eventually is probably the best bet." Not that a smoking iPhone is a good situation at all, but you can at least be sure that your iPhone is not quite as hot as the fire under your burgers this weekend.

[* Note that the Apple KB article referenced here about temperature warnings/"don't leave the iPhone in the glove compartment" for the iPhone 3G and 3GS is not a new post, nor is the temperature alert screen unique to the 3GS; the KB was simply updated to include the newer device. Jim Dalrymple at The Loop has a solid rundown. FoxNews incorrectly reported that the support article was specific to the 3GS, but then did cite PC World's Melissa Perenson and David Coursey with personal stories of wicked-hot 3GS units. If your 3GS is overheating, check in with Apple support or your local AT&T store. -Ed.]

Do you have Pre-envy due to the Touchstone and wireless charging capabilities? Well, good news then. A company called WildCharge has stepped in to give you similar charging capabilities with your original iPhone or iPod touch. The bundle is just shy of $80 and includes the charging pad and a gel skin that needs to be attached to your phone. Once installed, just lay your phone on the pad and get your charge on.

The skin unfortunately adds an unsightly hump at the base where the dock connector is, but that may be a small price to pay if you really need your iPhone charged sans wires.

The iPod touch version is available now with the iPhone version coming next month.

It's time once again for Ask TUAW! For this round we take questions about cleaning a malfunctioning Mighty Mouse, opening files and applications with the return key, expanding a Boot Camp partition, finding alternatives to Adobe Acrobat, caring for your notebook battery, and more

As always, your suggestions are welcome. Questions for next week should be left in the comments. When asking a question please include which machine you're running and which version of Mac OS X (we'll assume you're running Leopard on an Intel Mac if you don't specify). And now, on to the questions!

Apple's push notifications sure are neat, but they aren't the brass ring for developers on the iPhone. That, so far, would be background processes. And while Apple has said that background processes would just be too much of a drain on the iPhone's battery, that doesn't mean they don't want them, too.

Ars Technica reports that Apple is still trying to figure out a way for certain apps to do it. There's two options laid out here: one is user-based, in which the user actually approves certain apps to run in the background, with the consequence (if you do choose to enable that) of lower battery lifetime. The second has Apple approving apps for background action, allowing certain developers to run based on limits of "resource usage such as RAM or network bandwidth."

Obviously, there are pros and cons to each plan -- giving the power to the user means they will be able to choose when the battery is drained (on a particularly busy day, for instance, or when the iPhone is plugged in), but it also means that users will have the ability to crash their own phones (allowing too many background processes could cause issues). And of course, while leaving the choice in Apple's hands will make sure background processing is only used in the "right circumstances," we all know how great Apple is at app approval.

Ars concludes on the same point that I would: if background processes are really going to make a difference, they'll likely rely on a future iteration of the iPhone, as the one we've got now is just not built to run apps all the time, no matter who chooses them. Even if Apple is working out a way to run certain apps in the background, they are almost certainly spending more time beefing up the iPhone hardware as well.

I have a MacBook Air. Although I can get about 5 hours of mobile use out of it by dimming the screen, turning off all wireless, and only running one app at a time, there are times I'd love to be able to stay unplugged for much longer. I could always get a solar charger, but that won't work well when it's dark out.

QuickerTek has announced the MacBook Air External Battery, a US$350 external box designed to let you run your MBA for up to 16 hours before plugging in. It's relatively small (7" x 3.5" x 1" -- 17.8 cm x 8.9 cm x 2.5 cm) and adds 1.2 pounds to the weight you'll have to lug around.

In order to connect the external battery to your MacBook Air, you'll either have to send your existing MagSafe cable in to be converted for use (US$25) or buy a modified cable from QuickerTek (US$100). The final bill for the MacBook Air External Battery and the cable is almost as pricey as that solar-powered charger, but it's going to give your MacBook Air much longer battery life. Now if QuickerTek could just come out with a battery to let me play Monopoly (click opens iTunes) on my iPhone for 10 hours straight...

Apple released two separate software updates yesterday. The MacBook Battery Update 1.4 "improves the ability of MacBook batteries to maintain a charge when the system is shut down and not used for an extended period of time" and is for 13" MacBooks.

In addition, the Digital Camera RAW Compatibility Update 2.5 adds RAW support for the Nikon D3X and Epson R-D1x in iPhoto '08 & '09 as well as Aperture 2.

The battery update and the RAW update are both free downloads from Apple.

As usual, the fine folks at iFixIt immediately took apart the newest piece of Apple hardware to arrive at their offices, a unibody 17" MacBook Pro. The whole process was detailed with step-by-step photos, some of which reveal an internal battery roughly the size of a baby dolphin.

In case you're curious, and we know you are, that's a 7.3V 95Wh (12820 mAh) battery, Apple model #A1309. It contains no mercury (Hg) and weighs in at 1.5 pounds (0.7 kg)! The folks at iFixIt note, "It's only a matter of time until you'll be able to buy this battery online from companies like us."

It reminds me of the battery that came in the clamshell iBooks (in size at least). It sure looks easy to replace...

[Via Ars]

If you were wandering the halls of Macworld Expo last week, you might have seen a familiar face -- no, not the everpresent TUAW video crews, but the gadget-loving visage of Richard Thalheimer, founder of The Sharper Image and current head honcho of RichardSolo. The RS booth was a brief walk away from The Sharper Image's floor presence, but I believe maturity prevailed and no miniature helicopters or USB missile launchers were seen to buzz the competition's displays.

The RichardSolo iPhone and iPod extended-life batteries were visible at the show on attendees' iPhones, and most people visiting the booth seemed to be satisfied customers or would-be customers (Steve reviewed the latest model in November). Buyers at the show were eligible for a $30 discount on the original and newer 1800 models, but if you missed that opportunity you can still save: through the end of January, use coupon code 'Macworld' at checkout and get $20 off either product (usually $50US for the lower-capacity model and $70US for the 1800 model).

There's a good list of still-running Macworld Expo discounts at dealmac, but if you know of any that aren't on the list, shout them out.

[via MacObserver]

Apple posted details about how much it will cost to replace the battery in the new 17-inch MacBook Pro notebooks announced at last week's Macworld Expo.

The cost works out as follows:

• United States: $179
• Canada: C$219
• Europe: €179 (including VAT)
• United Kingdom: £139 (including VAT)
• Japan: ¥19,800 (including tax)
• Australia: A$299 (including VAT)
• China: 1498 RMB (including VAT)

Apple says batteries can be replaced and your laptop returned to you the same day if you make an appointment at an Apple retail store. Otherwise, mail-in replacement will take three to four business days after the unit arrives at depot.

Apple also says that battery replacement services may be available at your local Apple Authorized Service Provider, but the prices may vary from those listed on Apple's website.

Note that Apple claims these batteries will last three times as long as conventional laptop batteries (up to five years or 1,000 cycles), and any defects in the first year of ownership are covered under the existing warranty. It's not clear whether AppleCare would cover battery replacement during the extended warranty period if it wears out, since the battery is considered a consumable item. Jared points out in the comments below that AppleCare currently does cover batteries that wear our prematurely (before the rated number of charge cycles). Just FYI, you can check the cycle count of your battery via Apple System Profiler / "More Info" in About This Mac, by viewing the Power section.

Both 9to5Mac and AppleInsider are reporting on rumors that a 17-inch, unibody MacBook Pro will debut at this week's Macworld Expo. Most interesting is the rumor about the machine's battery.

Specifically, the alleged laptop's battery would be non-removable, very slim (consider the MacBook Air's battery) and able to run "...much longer" than the current model. The announcement of a new 17 inch MacBook Pro wouldn't be a very big surprise, but a non-removable battery would. People like removable batteries for obvious reasons.

Mike Rose guessed that we'd see a new 17 inch laptop when we all listed our predictions. We'll all see what happens in just a couple of days.

For full Macworld Expo coverage, bookmark the TUAW Macworld Expo 2009 landing page.

[Via Engadget]