| General > General Technical Chat |
| Charging Cell phone form a 9V battery |
| (1/3) > >> |
| hamster_nz:
Might be worthy of discussion... (but not really). |
| james_s:
I mean obviously it would work, but it's a very expensive way to get a partial charge into a phone. Maybe if you're stranded somewhere with a mobile phone, car charger and a pile of 9V batteries? |
| MosherIV:
If you look at the capacity of a 9v battery and the capacity of the battery in the phone, you woul realise that the 9v battery would give less tha a few % to the phone. |
| tooki:
And that’s before the losses incurred in the car lighter plug, many of which use a linear regulator to burn off the excess voltage as heat! |O |
| Twoflower:
The picture says in case of Emergency. I think it might be possible to charge the phone from dead-as-doornail to able to call a rescue team. Other than that: I totally agree not very useful. |
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