Core Viewpoint - The article highlights consumer grievances regarding electric bicycles, particularly focusing on issues related to battery failures and subscription-based app functionalities, suggesting that these problems may stem from deliberate business practices designed to extract additional fees from consumers [1][5][6]. Group 1: Battery Issues - Many electric bicycle owners, like Wang and Li, have reported sudden battery failures after approximately three years of use, raising suspicions about planned obsolescence by manufacturers [1][3]. - Consumers have experienced difficulties in charging their batteries, with service personnel often providing vague explanations and not offering detailed diagnostics [2][4]. - There are allegations that some manufacturers may have installed components that intentionally disable charging after a set period, leading to unnecessary battery replacements [2][7]. Group 2: App Functionality and Subscription Fees - Consumers have expressed frustration over app functionalities that become inactive after a certain period, requiring additional fees for continued use, which was not disclosed at the time of purchase [5][6]. - The lack of transparency regarding the app's subscription model has led to claims of misleading sales practices, as consumers believed they were purchasing a fully functional product without ongoing costs [5][7]. Group 3: Legal and Consumer Rights - Experts indicate that the practices of manufacturers may violate consumer protection laws, as they fail to inform consumers about limitations and additional fees associated with their products [6][7]. - Consumers are advised to assert their rights under the law, demanding full ownership and functionality of their purchased products without hidden fees or restrictions [8]. - Legal professionals suggest that consumers should collect evidence of their transactions and communications with sellers to support potential claims against misleading practices [8].