Devices and methods for data communication and sensing

A device, comprising:

• a battery having a first flowable electrolyte;
• a first channel containing the first flowable electrolyte of the battery, the first channel having
• a first electrode configured to impart and/or receive a first electrical signal in the first flowable electrolyte;
• and
• a blocking electrode disposed in the first channel and configured to prevent the first electrical signal in the first flowable electrolyte from transmission through the blocking electrode.

A device, comprising:

• a battery having a first flowable electrolyte;
• a first channel containing the first flowable electrolyte of the battery, the first channel having
• a first electrode configured to impart and/or receive a first electrical signal in the first flowable electrolyte;
• and
• a second electrode disposed in a second channel containing a second electrolyte, the second electrode being configured to impart and/or receive a second electrical signal in a second flowable electrolyte, wherein the first electrical signal and the second electrical signal are a differential pair.