Possible Duplicate: What can I do to increase battery life on my Android device?
My Desire is absolutely great, but with my usage the battery life is really a big problem.
I have a few apps running and polling in the background, obviously the Google stuff (Gmail, Talk, Maps probably poll because of Latitude). Then I have Twitter running (checks every 5 minutes), Google Listen (checks every hour). Google Market also checks for updates sometimes apparently, don't think I can switch that off.
My usage is pretty heavy, on my bicycle I listen to Spotify or a podcast for 20 minutes, then in the morning train (45 minutes) I will usually read Twitter and Google reader (the web app). Then I get to work and my battery is down to about 75%-70%. I usually charge it but if I don't then I will be out of battery by about 6PM. So thats 9 hours of battery life. The commute back is pretty much the same, battery will be dead before I get home.
I don't want to give up on instant notifications, so the 3G will always be on.
When I went camping for a weekend I turned all of the above polling off and only checked Twitter about 4 times, didn't use the phone for the rest of the day. Battery life improved slightly to about 14 hours. Still not great, I was hoping for at least 24 hours.
WiFi is always off by the way!
I've tried rebooting but the timings are mostly the same. Is it wise to buy a battery that can provide more mAh? Is there any good solutions for backup power when I don't have power available, when camping for example (aside from buying extra batteries)?
Go to StartScreen/Menu Key/Settings/About Phone/Battery/Battery use. It tells you which of your applications are using how much energy. Then you can make a more informed decision about whether certain applications are worth their energy usage.
私はこのオプションを忘れました！しかし、それは本当に当然のことだと思われ、Gowallaが私のバッテリーの90パーセントを使用していると言っています。 2010-07-21 19:21:08Z, License: CC BY-SA 2.5
この回答 Amanda 2011-03-21 16:04:54Z, License: CC BY-SA 2.5
バッテリー使用率表示では、どのカテゴリーが3Gインしていますか？ awe 2012-03-09 14:07:17Z, License: CC BY-SA 3.0
I forgot about this option! But it seems to be really wonky, it keeps saying that Gowalla is using 90+ percent of my battery, that's is just silly, I hardly even use the app, notifications are off an I killed it with a task manager 2010-07-21 19:21:08Z, License: CC BY-SA 2.5
This answer Amanda 2011-03-21 16:04:54Z, License: CC BY-SA 2.5
In the battery usage display, which category is 3G in? awe 2012-03-09 14:07:17Z, License: CC BY-SA 3.0
I would say that unfortunately your experience sounds fairly common with android. I use this: http://us.kensington.com/html/15460.html it's like carrying around an extra battery but it has the bonus of working with any device's USB charger.
When I first got my Desire, I did the same as you because I had found on my previous phone (Nokia E71) that with WiFi turned on the battery would be dead in 4 hours vs. 2 days on 3G.
I have found the opposite to be true of the Desire. If you have a WiFi signal available, use it. The WiFi chip in the Desire appears to be much more efficient than the 3G data radio. When I am out and about on 3G, the battery drains as you suggest - lucky to get 10 hours from it. When on WiFi at home, I will usually have 30-40 percent remaining when I go to bed at night. So turn that WiFi back on!
GPS is the other big killer. I've you've got Latitude or something like it that requires positional updates, I have found using WiFi and cell positioning (rather than GPS) saves a lot of battery (although it does lose accuracy of course).
GPSと3Gも私のための大きな殺人者です。 WiFiは、3Gと比較してよりエネルギー効率が高いように思われるようです。私は数回、私のバッテリーをローミングするデータを回したからです。ホテルの中にwifiを持っていて、そうでなければ電話としてそれを使っただけです。しかし、もちろん、それは欲求から「スマート」を切り取ります。 Twitterのポーリングを切り取るだけでなく、すでに役立ちます。 2010-08-12 11:27:29Z, License: CC BY-SA 2.5
GPS and 3G are the big killers for me, too. WiFi seems to be way more energy efficient compared to 3G. I have been to another country a couple of times and because I turned of data roaming my battery lasted for 3 days. Only had WiFi on when in the hotel and otherwise just used it as a phone. But of course that cuts the 'smart' out of the Desire. Probably just cutting back on the Twitter polling will already help 2010-08-12 11:27:29Z, License: CC BY-SA 2.5