jbarchuk:
I've followed this topic: Battery charger - General Electronics - Arduino Forum
Do you think i'm ok with that?That looks like the straight dope.
Why 
CrossRoads:
MAX1811 is easy to use for a LiPo.
Here I used one to charge a 1000mAH LiPo in my RF remote control.
I used 3AA battery pack for development, then connected the LiPo when I get the other parts in.
Has been running since ~Jan 2011.
Do you have the need to setup resistors based on the amps that your batteries have?