the batteries you speak of are lithium ion you can buy battery holders for these but one battery is 3.7 volts fully charged so you should use 3 in series to get enough voltage for the arduino on board voltage regulator. The batteries come in different maH rating such as 3000 milliamp hours but if you go this route buy a battery charger for these batteries only and never allow them to short out . Vape shops carry this stuff as we use them in our vaporizors