Turn off cellphone (SIM) radio

How do I turn the cellphone (SIM) radio on an Android phone? The radio consumes a lot of power (30-70%), especially when the phone is idle. Sometimes I only need to use other functions (e.g., clock, web browser), and make the battery last as long as possible. "Airplane mode" does this but also turns off the WiFi (close to, but not exactly what I need).
Category: Android

Does constant charging harm my Android cellphone?

I usually disconnect my cellphone from the charger some time after it's fully charged because I'm afraid the battery could lose capacity over time if I don't. However, I believe modern electronics should be able to handle this kind of scenario and automatically stop charging the battery once it's full. Does this apply to modern Android phones? Or do I need to continue disconnecting it all the time?
Category: Android

How can I improve the battery life on my device?

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 …
Category: Android

Battery conservation?

Possible Duplicate: What can I do to increase battery life on my Android phone? What are some general ways to improve the battery life of my phone?
Category: Android

Easiest way to reduce power consumption to phone only

Sometimes I'm in a situation where I can't charge and want to have phone service as long as possible. I won't care if nothing else is enabled. What's the easiest way eliminate as much other power consumption as possible? Minimal apps, no sync, no data, GPS, Bluetooth. I'm configured to easily turn off all the radios (BT, Wifi, GPS), but I'd like to strip down as much else that burns power as possible without spending a lot of time reconfiguring. …
Category: Android

HTC Evo - Can Wi-Fi Radio Sleep?

I've noticed that when actively downloading a lot of data, the Wi-Fi radio uses much less power than the 3G radio. However, when the phone is not being used much, the 3G radio will sleep but the Wi-Fi radio will not. This actually means that if I leave Wi-Fi on, my battery will drain about 2.5 times faster than if I were using 3G. Is there a way to get the best of both worlds? When in range of a …
Category: Android

What can I do to increase battery life on my Android tablet?

Tablets have different usage profiles than phones. So many of the "Phone" suggestions don't apply. So, what can I do to get better battery life on my Android Tablet. (TechPad 7" Tablet from Chinavasion, S3C6410 Android 1.6;) Works well, except something unexpected is consuming power; Just having the tabled turned on will drain the battery in 2-3 hours. Also, the power status shows 40% of my battery is always being used by "cell standby"; While this tablet has Wifi, it …
Category: Android

Which uses more power/drains more battery: HTC Evo 3G or 4G?

I've read mixed reports online about which radio uses more power -- 3G or 4G. Has anyone done any semi-scientific tests that would answer this question? When constantly downloading data over the same period of time, which uses more battery (battery drain per second of download)? When downloading the same amount of data, which uses more battery (battery drain per KB)? Do both radios sleep with the same consistency? Do they use the same amount of power when sleeping or …
Category: Android

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