Abstract: The present disclosure provides a charger for a battery pack. The battery pack includes a battery input line, a battery sense line electrically connected to the battery input line, and one or more electrochemical cells electrically connected to the battery input line. The charger includes a charger integrated circuit (IC) including an input pin, an output pin, and a sense pin. The charger further includes a charger output line electrically connected to the output pin of the charger IC. The charger output line is electrically connected to the battery input line upon coupling of the battery pack to the charger. The charger further includes a charger sense line electrically connected to the battery sense line upon coupling of the battery pack to the charger. The charger also includes an analog switch electrically disposed between the charger sense line and the battery sense line.