The 18650 lithium battery is a commonly used lithium battery in electronic products. It is often used in batteries of laptop computers and power banks. 18650, which refers to a battery with a diameter of 18mm and a length of 65mm.
This 2 x 18650 battery holder has inner connection in series, DC 2.1 power jack, standard 7.4V output. You can connect Arduino directly.
The spring plate is nickel plated with stainless steel.
The material structure is firm and durable.
Battery Model: 18650
Cell number: 2
Output Voltage: 7.4 V
Plug form: DC 2.1 (outer diameter 5.5, inner diameter 2.1)
Size: 77.9 x 40.11 x 21.41 mm/ 3.07 x 1.58 x 0.84 inches