Switching power sources, battery charging

[Demon]

There's a few reasons why I wanted to stay away from a relay:

- they must be slower than transistors.
- mechanical parts mean wear.
- and I really was looking for an excuse to finally use mosfets.


I don't know why the design I posted at the top uses 2 mosfets back-to-back. According to this site (and many others) P-channel mosfets are connected "backwards" and you only need one to act as a switch:
http://www.electronics-tutorials.ws/...or/tran_7.html
(scroll down to P-channel MOSFET Switch)

Robert


EDIT: Updated design