A smartphone battery tends to deteriorate more slowly when the device is used while charging within the 40%–90% range. This observation comes from Denis Kuvikov, director of SafeNet, the regional engineering center under the National Technology Initiative (NTI), as reported by Russia Today.
Kuvikov explains that all smartphone batteries experience gradual aging over time. The rate of this aging is influenced by user habits, temperature, and charging practices. He notes that avoiding very cold conditions can help preserve battery performance, since environmental temperature has a direct impact on capacity and responsiveness.
In practical terms, cold environments—whether severely below zero or just around freezing—accelerate discharge and degrade performance. Battery life may shorten and the device may respond more sluggishly when temperatures are low. This is a reminder that thermal management matters as much as charging routines in maintaining usable battery life.
Additional guidance from Kuvikov emphasizes resisting the notion that a battery must be discharged completely to zero before recharging. With advances in materials and charging technology, reliance on full discharge has become outdated. For optimal everyday use, he advocates keeping the battery within the 40%–90% window rather than letting it dip to the extremes.
Beyond these practical tips, experts highlight a few broader considerations for sustaining battery health. Using high-quality chargers and cables, avoiding rapid charging too frequently, and updating device firmware can all contribute to better long-term performance. Battery chemistry is sensitive to stress, so managing heat, charge cycles, and consistent operating conditions is part of responsible device care.
In summary, keeping a smartphone’s battery within a moderate range and avoiding extreme temperatures can help maintain peak performance over time. The guidance reflects current understanding of battery science and practical user habits, with a focus on everyday routines rather than dramatic, short-term fixes. [Citation: SafeNet NTI, Denis Kuvikov, Russia Today reporting]
Related discussions in the tech community continue to explore how manufacturers design smarter charging systems and thermal controls to extend battery life. As devices become more capable, understanding how to balance charge levels and environmental factors remains a key part of preserving performance.