An Exhaustive Guide to Saving Your Smartphone's Battery - Battery - Lifehacker（情報元のブックマーク数）
3Gの切り替えをちゃんとする、不要なサービスを止めるとか、バックグラウンドアプリをとめるとか、当然なことだが書かれている。
http://lifehacker.com/5375325/an-exhaustive-guide-to-saving-your-smartphones-batteryUniversal battery tips
They're different in a lot of ways, but all smartphones can be made to be more frugal with their limited power reserves if you're willing to follow a few simple rules of thumb.
- Keep it cool and out of pocket: If you're outside, don't leave your phone facing the direct sunlight. If you can pull it off without looking like a hyper-aggressive real estate agent, belt-clip your phone, or generally keep it out of your pocket and away from close quarters with your body heat.
- Switch off 3G when it's unnecessary: It's faster than EDGE or GRPS and can deliver both voice and data in a continuous stream to your phone. It also uses up quite a bit more power. When you've got good coverage and plan to mostly talk, or just get occasional email updates, you don't need such wide wireless pipes. Switch to EDGE/2G usage in your settings, preferably with a widget or shortcut.
- Switch off any unneeded service: Goes without saying for anyone who's learned the hard way. Having your phone constantly look for new Bluetooth devices, Wi-Fi hotspots, GPS positions, and Exchange server emails that don't arrive at 4 a.m. will definitely kill your battery. Find the most convenient way your phone offers to turn these things off, or automate their use, and act on it.
- Be frugal with background applications and notifications: It feels like living in the future when new emails, Twitter messages, Facebook updates, calendar appointments, and other minutiae are delivered minute-by-minute to your phone. Your battery lives in the present, though, and could use a break from your hyper-awareness. If you've got a phone that can keep multiple applications "open" for quicker access (Android, Pre, Windows Mobile), don't feel obligated to keep them present.
- Fiddle with screen time-outs and brightness: Tweak how long your screen stays lit after a quick time check, modify how bright it must stay during the daylight, and you'll likely pull a bit more use time from your handset.
- Use mobile site versions: Find and bookmark the mobile versions of the sites you always visit (often found at m.sitename.com, mobile.sitename.com, or, occasionally, sitename.com/m), and keep tools like the Google Mobilizer and Bing Mobile handy; they'll automatically pare down a page to its basic elements, and save your phone from having to burn its battery pulling down giant banner ads. Using Google mobile search on some phones also presents an "Options" menu next to each result, which provides a "mobile" link for any page.
ってことで、iPhoneだが、サービス停止やメールのフェッチ間隔とか、色々書かれている。
http://lifehacker.com/5375325/an-exhaustive-guide-to-saving-your-smartphones-batteryiPhones
Apple's game-changing, full-web-browsing phone has had its battery life detractors from the get-go. Luckily, some have put their efforts into fixing that. Photo by Mat Honan.
- Apple's official tips: To summarize: Don't get it too hot or too cool, turn off unnecessary services, "lock" it frequently, and let the battery run completely down, and then charge to 100 percent, at least once a month.
- Gizmodo's suggestions: To summarize: Change from Push to Fetch email, turn off contacts and calendar sync if you're not a CEO, cancel scanning for new Wi-Fi networks, and avoid games with vibration and 3D graphics (except in seriously long airport lines).
- Toggle networks with SBSettings jailbreak app: By default, the iPhone's on/off switches are tucked inside the settings, and the phone can only automate screen brightness. With SBSettings installed on a jailbroken phone (from the BigBoss repository), you can not toggle all your data connections on and off from a flip-down widget, and fine-tune other battery-grabbing aspects of your phone. See and read more about SBSettings at The Apple Blog. Thanks j_rich!
- Use the battery percentage indicator: The standard battery indicator can leave you guessing as to how healthy your iPhone actually is, and sometimes misreports its state entirely. If you've got a iPhone 3GS, or a jailbroken iPhone, you can enable a numeric percentage read on your lock screen by heading to Settings, General, and then Usage to toggle "Battery Percentage" to On.
- Use Prowl, GPush, or very light Push for Gmail: We first showed you how to use Prowl and Growl to push Gmail to your iPhone, and it remains a more battery-efficient means of getting important email notifications, particularly while your main work computer is running. We also detailed a work-around with GPush that works at any time when it works, period. Since then, Gmail has added official push support for instant email notifications, but it also makes manual email fetching more reliable, so users can set it to an hourly or manual interval to save on battery use. Thanks drjonze and wbullockiii!
