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Old Apr 09, 2012, 01:33 PM
dave1993 is offline
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RC beginner
New York
Joined Oct 2008
6,054 Posts
Quote:
Originally Posted by Ribble View Post
Buy a V911 and open up the charger. You will find more than a resistor and diode.
i havent dismantles mine yet and its at home atm. i dont suppose there is a photo or link available showing one? id be surprised if there was anything else in the actual charge circuit on any low cost heli.

Quote:
Originally Posted by Ribble View Post
Then you have USB voltage which is a regulated +5 volts. The battery charges to 4.2 volts - you are not going to cook a battery with that little voltage difference.
actually it is usually current not voltage that "cooks" a lipo. also note that usb sources can vary by almost a volt even on pc mb. this from actual measurements, not spec sheets.

Quote:
Originally Posted by Ribble View Post
Inside the USB plug may be where they hid your resistor and diode.
thats exactly where they are on those yellow s107 chargers.
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