4 ms·

But is that the only battery? Is there a battery or cap powering the clock for example? Can that be corrupted?

nwh 13y ago
Phones certainly don't have big enough capacitors to store enough power to run a radio. There's probably only a few pF of capacitance in an entire iPhone for example, though it not having an easily removable battery makes that a little moot.
- lotsofcows 13y ago
  I've had a look at a few teardowns but can't find another battery. My 'phone copes with the battery being removed while in offline mode so there's power somewhere.
- a3n 13y ago
  But they probably do have enough power somewhere to silently turn themselves on, say briefly, according to some schedule or event. Not saying it's being done, but it could be done.
  - nwh 13y ago
    Where? No other components store power in any way. There's a few small capacitors lying around, but they're so small that you could never power anything from them. If something like this existed, people would have noticed a long, long time ago.
frandroid 13y ago
The "battery to keep your clock on time problem" was a problem of the offline PC world. Cellphones just need to get network time when they boot if they lost time. Thus manufacturers shouldn't need to include a separate clock battery in the limited space on a phone body.
- joosters 13y ago
  That's no good. You might power your phone back on in an area without network coverage, or the signal might take too long to receive after power up, or you are running in flight mode on a plane, or ... Basically, you still need a local clock.
- jmpe 13y ago
  Sorry, you're wrong. Samsung Galaxy S1: http://www.techinsights.com/uploadedImages/Public_Website/Content_-_Primary/Investigative_Analysis/2010/Samsung_Galaxy_S_GT-I9000/samsung-galaxy-board-1.jpg http://www.techinsights.com/uploadedImages/Public_Website/Co... The internal battery is located at the top-right - a circular coin cell soldered to the board. Samsung Galaxy S2: http://i295.photobucket.com/albums/mm148/rprosperojr/IMG_1204.jpg http://i295.photobucket.com/albums/mm148/rprosperojr/IMG_120... The internal battery is located at the center-top Edit: In case of the SGS2 it's located next to the WLan/BT module.

nwh 13y ago

Phones certainly don't have big enough capacitors to store enough power to run a radio. There's probably only a few pF of capacitance in an entire iPhone for example, though it not having an easily removable battery makes that a little moot.

lotsofcows 13y ago
I've had a look at a few teardowns but can't find another battery. My 'phone copes with the battery being removed while in offline mode so there's power somewhere.
a3n 13y ago
But they probably do have enough power somewhere to silently turn themselves on, say briefly, according to some schedule or event. Not saying it's being done, but it could be done.
- nwh 13y ago
  Where? No other components store power in any way. There's a few small capacitors lying around, but they're so small that you could never power anything from them. If something like this existed, people would have noticed a long, long time ago.

frandroid 13y ago

The "battery to keep your clock on time problem" was a problem of the offline PC world. Cellphones just need to get network time when they boot if they lost time. Thus manufacturers shouldn't need to include a separate clock battery in the limited space on a phone body.

joosters 13y ago
That's no good. You might power your phone back on in an area without network coverage, or the signal might take too long to receive after power up, or you are running in flight mode on a plane, or ... Basically, you still need a local clock.
jmpe 13y ago
Sorry, you're wrong. Samsung Galaxy S1: http://www.techinsights.com/uploadedImages/Public_Website/Content_-_Primary/Investigative_Analysis/2010/Samsung_Galaxy_S_GT-I9000/samsung-galaxy-board-1.jpg http://www.techinsights.com/uploadedImages/Public_Website/Co... The internal battery is located at the top-right - a circular coin cell soldered to the board. Samsung Galaxy S2: http://i295.photobucket.com/albums/mm148/rprosperojr/IMG_1204.jpg http://i295.photobucket.com/albums/mm148/rprosperojr/IMG_120... The internal battery is located at the center-top Edit: In case of the SGS2 it's located next to the WLan/BT module.