How Long Will My Phone Battery Last?
Liang He, Kang G. Shin

TL;DR
This paper introduces V-Health, a low-cost, user-level battery health estimation service for mobile devices that uses battery voltage data to accurately assess battery degradation, enhancing device safety and user experience.
Contribution
We propose V-Health, a novel battery SoH estimation method based solely on voltage, validated through extensive empirical measurements and real-world testing on various mobile devices.
Findings
V-Health achieves less than 5% error in SoH estimation.
Extensive measurements over 72 months on 15 batteries support the method.
V-Health enables four new user-centric applications.
Abstract
Mobile devices are only as useful as their battery lasts. Unfortunately, the operation and life of a mobile device's battery degrade over time and usage. The state-of-health (SoH) of batteries quantifies their degradation, but mobile devices are unable to support its accurate estimation -- despite its importance -- due mainly to their limited hardware and dynamic usage patterns, causing various problems such as unexpected device shutoffs or even fire/explosion. To remedy this lack of support, we design, implement and evaluate V-Health, a low-cost user-level SoH estimation service for mobile devices based only on their battery voltage, which is commonly available on all commodity mobile devices. V-Health also enables four novel use-cases that improve mobile users' experience from different perspectives. The design of V-Health is inspired by our empirical finding that the relaxing…
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Taxonomy
TopicsAdvanced Battery Technologies Research · Green IT and Sustainability · Age of Information Optimization
