Patent ID: 7672798

Claim:
A battery charging apparatus, comprising: a battery charger having a microprocessor that comprises a field programmable gate array, which receives a set-point value, said battery charger having a housing for receiving a battery, wherein the microprocessor is linked to the battery charger; an automatic temperature sensor linked to the microprocessor; a connection using at least one clamp to connect to the battery; a comparator that compares a voltage upstream from the connection of the clamp with a voltage at the connection of the clamp to test a quality of the clamp connection to the battery; and a module in communication with the microprocessor, and adapted to communicate with similar modules of other battery chargers to network the battery charger with other battery chargers, wherein the battery charger determines at which point in a sine wave to allow voltage or current to pass through to the battery to be charged based on a sine value selected, wherein the selected sine value is determined by observing an end-point of the sine wave and following along the sine wave in a rearward direction, the sine value defining a mean voltage or mean current for pass through.