What Type of Battery (i.e. Battery Specs)

Hello,
I understand there are different battery technologies such as Lithium Ion, Lithium Polymer (LiPo),
and there are technical specs such as Capacity (in Ah or mAh), Configuration (amount of Cells, Voltage), Discharge Rate (such as 10C or 20C)

Can anyone enlighten us noobs what means what, or have a link on hand where we can learn more about this?

Also, what is recommended for the OpenPPG, and what are the advantages/disadvantages on the different technologies?

Thanks a lot in advance
Etienne

Sorry all, on another thread the answer was already given.
Here is everything we need to know: A Guide to Understanding LiPo Batteries — Roger's Hobby Center