Battery Pack

A method of charging a battery pack configured to operably couple to a battery charger, the battery pack having a positive voltage terminal and a negative voltage terminal, the battery pack comprising:

• providing a plurality of designated terminals configured to operably couple to the battery charger, such that the plurality of designated terminals excludes the positive voltage terminal and the negative voltage terminal;
• determining a specific location of a given terminal of the designated terminals;
• and
• determining an attribute of the battery pack based on the determined specific location of the given terminal amongst the designated terminals.

A method of charging a battery pack configured to operably couple via a plurality of electrical terminals to a battery charger, the plurality of electrical terminals including a positive voltage terminal and a negative voltage terminal, the battery pack comprising:

• providing a plurality of designated terminals configured to operably couple to the battery charger, such that the plurality of designated terminals excludes the positive voltage terminal and the negative voltage terminal;
• determining a number of the plurality of designated terminals that are connected to a reference voltage;
• and
• selecting a charging algorithm based on the determined number of the plurality of designated terminals that are connected to the reference voltage.