The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Sep. 30, 2021
Amazon Technologies, Inc., Seattle, WA (US);
Nayana Teja Chiluvuri, Seattle, WA (US);
Fu-Pang Hsu, Bellevue, WA (US);
Xunwei Yu, Kirkland, WA (US);
Zhao Xu, Bellevue, WA (US);
Ming Feng, Cupertino, CA (US);
Chang Hwa Rob Yang, Sammamish, WA (US);
Shelby Ovrom, Seattle, WA (US);
AMAZON TECHNOLOGIES, INC., Seattle, WA (US);
Abstract
A charger prevents charging of a wearable device battery when sweat or another conductive contaminant is present. The charger initially provides a low voltage to detect when the wearable device is engaged. When the wearable device is engaged, a measured current value exceeds a threshold minimum value. If sweat or another conductive contaminant is present, the additional conductive pathway provided by the contaminant will cause the measured value to exceed a threshold maximum, and charging of the battery is prevented. If a contaminant is not present, the measured value will be greater than the threshold minimum and less than the threshold maximum. A higher voltage may then be provided to charge the battery. When the device is removed from the charger, the measured value will decrease below the threshold minimum and the charger may return to providing low voltage to detect engagement of the device.