Arduino - battery-power-help

Using Arduino General Electronics
1

hi need to use these batteries in arduino. but as I can control
voltage drop of these, so it does not spoil?

batteria was thinking putting these in series, which would give 11.1 v. 5000mAh, 1C.

as I can do this?, for the consumption of 3.2A, which would be the time duration of the batterias?,

total ampere these batteries is 5A?

http://www.ebay.com/itm/10x-5000mAh-3-7V-18650-NCR-Rechargeable-Li-ion-Battery-For-LED-Flashlight-Torch/400562904268?_trksid=p2047675.m1982&_trkparms=aid%3D333005%26algo%3DRIC.FIT%26ao%3D1%26asc%3D177%26meid%3D1052120210342713093%26pid%3D100009%26prg%3D1088%26rk%3D1%26rkt%3D5%26sd%3D290954980627%26