Put me in charge!
November 16, 2012 5:46 PM Subscribe
Explain to me the technology of charging devices. Is it mainly about voltage? About current? How close to the "required" values must you be?
posted by Obscure Reference to Science & Nature (9 answers total) 12 users marked this as a favorite
Sometimes it takes a long time to charge a device. Sometimes it takes less time for the same device. What is it about charging via USB that makes it slower (if, in fact, it is) than charging it with an adapter that plugs into house current? Why can things be overcharged? And how can some things never overcharge (or so the manual says)? What did my phone detect when it displayed a message that said "this cable is not recommended for charging this device" when I attempted to charge it with a cable that looked to me just like all the others?
Lastly, my cordless landline phone sits in a cradle to charge it that says 9 Volts 150 mA. I assume some of that is to detect whether it is in the cradle or not and the rest is to charge the battery. How far off of these values can I stray (since it no longer works, thanks to the recent flood) with out it being ruined?