Core Viewpoint - The article discusses the recent issues surrounding power banks, particularly focusing on the quality problems caused by a specific battery cell supplier, which led to safety concerns and recalls in the market [4][8][6]. Group 1: Quality Issues and Supply Chain - A major quality issue with power banks was traced back to a battery cell supplier that improperly replaced the separator material between the positive and negative electrodes, resulting in defective products that could overheat, swell, or even catch fire [8][6]. - The defective power banks entered the market around early 2024, leading to widespread recalls and bans due to safety hazards [8][6]. Group 2: Battery Lifespan and Maintenance - Lithium-ion batteries, including those in power banks, have a limited lifespan due to the inevitable chemical reactions that occur during charging and discharging cycles, which can lead to irreversible damage [12][13]. - The phenomenon of lithium plating, where lithium ions form sharp dendrites that can pierce the separator, is a significant factor in battery failure and safety risks [16][15]. Group 3: Recommendations for Battery Care - Users are advised to avoid extreme temperatures and humidity, as well as to monitor for physical changes in batteries, such as swelling or leakage, which indicate potential hazards [21][24]. - For aging batteries that show no physical changes but have degraded performance, it is recommended to charge them periodically and store them in a controlled environment to extend their usable life [33][35]. - Devices currently in use should be protected from water exposure and physical impacts, as these can lead to short circuits and other failures [39][42].

Group 1 - The core viewpoint of the articles emphasizes the importance of proper battery management to prolong the lifespan of electric vehicle batteries, highlighting common misconceptions about charging practices [1][2][4][10][13] - As of the end of 2024, the total number of new energy vehicles in China is expected to reach 31.4 million, accounting for 8.90% of the total vehicle population, with pure electric vehicles making up 70.34% of new energy vehicles [1] Group 2 - Overcharging lithium batteries can lead to the formation of "dead lithium," which reduces overall battery capacity and can cause structural instability in the battery [4][9] - It is recommended to charge lithium batteries to a range of 80%-95% to balance charging speed and battery longevity, while lithium iron phosphate batteries can be fully charged periodically for voltage calibration [9][10] - Deep discharging batteries to very low levels can cause irreversible damage to the battery's structure, leading to a significant reduction in usable capacity [10][12] Group 3 - Fast charging technologies, while convenient, can negatively impact battery health if not managed properly, as they can lead to overheating and the formation of lithium dendrites [14][18] - Effective thermal management during high-speed charging is crucial to prevent battery degradation, as elevated temperatures can convert lithium ions into dead lithium [18]