SparkFun Lithium Ion Battery 2200mAh 7.4V - 2-Cell Pack programmer com/adafruit-perma-proto-hat-for-pi-mini-kit

com/adafruit-perma-proto-hat-for-pi-mini-kit

and any setup where accurate pH data matters

and a wide range of frequency tuning

and other variants of Arduino that has no built-in USB compatibility

rocks/products/3d-printer-cnc-timing-pulley-2gt-18x5mm-teeth Pinout & power notes

SparkFun Lithium Ion Battery 2200mAh 7.4V - 2-Cell Pack programmer com/adafruit-perma-proto-hat-for-pi-mini-kit7. 4V Li Ion Battery 2200mAh (2S) The Lithium Ion Battery 7. 4V 2200mAh is a higher capacity 2S pack for robotics, camera gimbals, and portable power applications that need 7. 4V with longer runtime. Technical specifications Chemistry Lithium Ion Configuration 2S Voltage 7. 4V nominal Capacity 2200 mAh