3 ms·
Not even then; many electronic devices (PCs, for example!) have coin-cell backup batterys or large capacitors to keep RTCs and the like running during a battery
by a1369209993 7y ago
Not even then; many electronic devices (PCs, for example!) have coin-cell backup batterys or large capacitors to keep RTCs and the like running during a battery replacement (or mains power outage).
- im3w1l 7y agoSince radio and gps use a lot of battery, I wonder if a coincell could really power them.
- deleted 7y ago[deleted]
- a1369209993 7y agoYou don't actually need to transmit the data off a backup battery, just store it and ship it out once a proper power supply is reattached. (You lose the data if someone destroys their phone, but that's a much narrower range of scenarios than "turn it off, but for real".) I don't recall GPS recievers being particularly power-intensive, but there's plenty of other sensors to log, most notably the microphone.
- im3w1l 7y agoYou don't use your phone for navigation a lot do you? It drains the battery very quickly. I mentioned radio, because wifi / cell tower triangulation can be used to infer location.