Pedro Drummond wrote:

>  
> Hi, friends
> 
> Lost my cell phone charger.
> 
> How can I quickly and painless charge its battery, with a good DC supply?
> Any good hints and major do's or don'ts ?


Very very carefully.

Most phones control the charge process themselves. The wall wart just
provides an approximately correct voltage so you just need
to supply something close.

Other phones, like Samsungs, put the smarts into the charger,
which is why their car charger cord is $100.
If your phone is the latter, and uses Lithium Ion batteries,
DO NOT EVEN THINK of charging it with DC supply.

If you're using NiCad of NiMHi then limit your charge current
to 200mA or so, and terminal voltage to about 1.34V per cell.

Use the above information AT YOUR OWN RISK!

Robert

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist