Battery Power vs Weight

[Mine]

How many batteries should the enclosure hold?

Should we just take up all the unused space with room for battery modules?

How many external batteries should we support?

[Mine]

Types of Lithium-ion Batteries
http://batteryuniversity.com/learn/article/types_of_lithium_ion

http://www.batteryspace.com/lifepo4-26650-rechargeable-cell-3-2v-3300-mah-19-8a-rate-10wh---un38-3-passed-ndgr.aspx

http://www.batteryspace.com/limnni-26650-rechargeable-cell-3-7v-4000-mah-4a-rated-14-8wh---ul-listed-un38-3-passed-ndgr.aspx

http://shop.battex.cz/pdf/400434LM.pdf