Patent ID: 8180584

Claim:
A battery charger and tester, comprising: a controller that controls a testing function of the battery charger and tester including a field programmable gate array, wherein the field programmable gate array receives a set point value; a connection having at least one clamp to connect to a battery; a comparator that compares a voltage upstream from the connection with a voltage at the connection to test a quality of the connection to the battery; a memory in communication with the controller, the memory stores a battery test procedure; an input device to input a battery identifier information of the battery; and a wireless communication port in communication with the controller, the wireless communication port communicates a battery test result to a remote device, wherein the battery charger and tester determines at which point in a sine wave to allow a voltage or current to pass through to the battery based on the set point value, wherein the determined point is determined by observing an end-point of the sine wave and following along the sine wave in a rearward direction, the determined point defining a mean voltage or current for pass through.