Charging Circuit and Voltage Regulator for my robot

[Sesam]

I am currently trying to make a cheap cleaning bot which I had laying around for some time work with my Raspberry Pi! I want to connect a xbox 360 kinect camera at some point and let the robot drive by itself!
Right now the robot is in the state that I am using a l298n to drive the motors of the robot with 9v and I should also be able to power my Raspberry Pi B+ through it.
Since the Xbox Kinect seems to be using 12V input (I don't have a kinect yet) I thought about using 10 Duracell AA batteries in series (http://www.amazon.de/gp/product/B000XM5B7W?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=AZ66MBFPDMDG0) to power the robot.
Now the problem I have is i have no clue what charging circuit board I should by or build myself and I am not sure if my thoughts about the batteries having enough power are right.
I would love my robot to be online while charging and not having to remove the batteries every time to charge!
Thank you in advance,
Sesam

[danadak]

Generally speaking battery operated gear has inferred requirements for high
efficiency, so switched regulation usually appropriate.

If you go to the TI/National Semi web site there are web design tools that
make design quite straight forward, and include the thermal design as well.

As I recall tools named Webench. And many ap notes covering design considerations.

http://www.ti.com/lsds/ti/analog/webench/overview.page?DCMP=analog_power_mr&HQS=webench-pr

Regards, Dana.

[Audioguru]

Those battery cells are Ni-MH. Go to www.batteryuniversity to learn about how to charge them.
To determine if the batteries produce enough power then simply measure how much current the robot uses and look on the datasheet of the battery. My AA size Energizer Ni-MH cells can produce more than 5A for almost 10 minutes.

[Sesam]

Thank you both for replying but I have now realised that Li-Ion batteries seem to be a better way to go!:)