APPARATUS AND SYSTEM FOR PROVIDING STACKED-SERIAL BATTERY CHARGING OF REMOVABLE BATTERY PACKS

A method of charging a plurality of battery packs may include applying a first constant current to a battery for a first period of time until a first charging voltage value is reached for the battery to define a first charging stage, applying a second constant current to the battery for a second period of time until a second charging voltage value is reached for the battery to define a second charging stage, and sequentially repeating application of the first and second charging stages to one or more additional batteries such that each of the one or more additional batteries enters the first charging stage when a previous battery in the first charging stage transitions to the second charging stage, and the each of the one or more additional batteries transitions to the second charging stage upon completing the first charging stage until all of the battery and the one or more additional batteries achieve a desired state of charge.