Charging habits that can slow down your smartphone's battery
Leaving your phone plugged in overnight has become a normalized routine, and in terms of safety, it's not a major issue with modern devices.
However, it's not the most optimal practice for battery health
While the habit itself isn't perilous, it does hide an important detail that often goes unnoticed. The culprit lies in the wear and tear, as today's batteries are designed to withstand thousands of charge cycles but their performance is affected by certain usage patterns that aren't ideal.
This has been confirmed by the EU, with a definitive change on the horizon: come 2027, you'll be able to replace your phone's battery yourself at home.
The reason we tend to charge our devices at night is straightforward – it allows the device to start the day with a full battery, as it's not in use and can recharge. This logic aligns with how we use our phones, but not necessarily with how batteries function.
What happens when your phone stays plugged in
Even though modern systems manage charging to avoid overloads, it doesn't mean the battery stops suffering from degradation. Lithium-ion batteries, in particular, aren't fond of extremes, so they work more efficiently within a mid-range charge, far from both 0% and 100%.
When a phone remains connected for hours, it generates an internal chemical stress that accelerates its aging process. This stress isn't immediately visible, but it accumulates over time.
Heat also plays a significant role. While contemporary phones control this factor, keeping your device plugged in for extended periods can create a less-than-ideal environment for the battery.
The micro-cycles of 100% charging
Once the device reaches a full charge, it doesn't completely disconnect from the charging process. Instead, it enters small cycles of charge and discharge to maintain that level. These micro-cycles, repeated night after night, contribute to the progressive wear and tear, even if they don't cause an immediate failure – they simply reduce the battery's capacity over time.
The end result is a familiar one: as you continue using your phone, the battery doesn't last as long, the percentage drops faster, and the overall experience deteriorates before its expected lifespan.
This is simply chemistry applied to poor habits.
So, what can you do to better care for your battery?
Reducing the time your phone stays at 100% can slow down this degradation process. It doesn't require drastic or complicated changes, but rather a different approach to managing your device's charge. Charging your phone at times more in sync with your real usage or avoiding unnecessary hours of connection can help preserve battery health in the long run.
Manufacturers have launched optimized charging systems aiming to mitigate this issue, with some devices even delaying the final charge until just before use, reducing the time spent at 100%.