Removable batteries were once standard on smartphones, allowing for easy replacements. However, design trends shifted towards thinner devices, premium materials like glass, and water/dust resistance, making sealed batteries the norm. Factors like the need for internal space, fragility of removable back panels, and consumer preference for premium finishes contributed to this change. Additionally, easily replaceable batteries might encourage users to keep devices longer, impacting upgrade cycles.

Despite this trend, a new European Union regulation set to take effect in February 2027 aims to bring back removable batteries. This law mandates that phones and tablets sold in the EU must have batteries removable by the end-user using commercially available tools, without specialized adhesives or heating. The goal is to extend device lifespans and reduce electronic waste.

While the regulation could lead to a resurgence of removable batteries, companies might still find ways to comply without drastically altering designs. Exceptions exist if manufacturers provide replacement batteries to professional repairers and meet specific battery health and water-resistance standards, potentially allowing models like the iPhone to maintain their sealed designs while adhering to the new rules.