When I purchased my TDI I received two batteries with the package. As I only use one battery most of the time ( 4 hours of TDI humming in my ear and I an hypnotised ) should I for extended battery life;
* Store the second battery fully charged?
* Alternate the use of the two batteries?
* Or discharge and store the second battery?
* Store the second battery fully charged?
* Alternate the use of the two batteries?
* Or discharge and store the second battery?