Key Takeaways
- Leaving your phone plugged in overnight does not meaningfully damage modern lithium-ion batteries.
- Manually closing background apps rarely improves performance and can actually slow your device down.
- More megapixels on a camera does not automatically mean better photo quality.
- Putting a wet device in rice is largely ineffective and can delay proper repair.
- Higher charging wattage from a certified charger will not damage a properly designed device.
Why Gadget Myths Persist
Device advice travels fast — through group chats, social media comments, and well-meaning friends. The problem is that much of it was either misunderstood from the start, or based on older technology that no longer reflects how modern devices actually work. Acting on bad information can mean wasted money on accessories you don't need, habits that produce no benefit, or real damage from a misguided fix.
This article corrects some of the most common and consequential misconceptions in plain language. For a broader look at sustainable habits that genuinely help, see habits that actually make a difference.
Myth
You should always let your battery drain completely before recharging it.
Fact
Modern lithium-ion batteries last longer when kept between roughly 20% and 80% charge, not drained to zero.
This advice dates back to older nickel-cadmium (NiCd) batteries, which could develop a «memory effect» if not fully discharged. Lithium-ion batteries — used in virtually every smartphone, laptop, and tablet sold today — work on an entirely different chemistry. Repeated full discharges actually accelerate wear on lithium-ion cells. Most device manufacturers now build charge management software that handles this automatically, slowing the charge rate as the battery approaches full.
Myth
Leaving your phone plugged in overnight will overcharge and ruin the battery.
Fact
Phones stop drawing charge once they reach 100%; modern charging circuits prevent overcharging by design.
Contemporary smartphones include dedicated charge controllers that cut power delivery when the battery is full. Some manufacturers go further by enabling features that intentionally hold the battery at around 80% overnight and top it up just before the user typically wakes up — a strategy explicitly designed to reduce long-term wear. While keeping a device at 100% for extended periods is mildly suboptimal for lithium-ion chemistry, the effect over normal overnight charging is negligible compared to other factors like heat exposure.
Myth
Closing apps running in the background makes your phone faster and saves battery.
Fact
On modern operating systems, force-closing apps typically has no performance benefit and may actually slow things down.
Both iOS and Android are built to manage background processes automatically. Apps in the background are generally frozen or given minimal resources. When you force-close them and reopen them later, the device has to reload them from scratch — which uses more CPU and memory than simply resuming a suspended app. The misconception likely persists because the act of swiping away apps feels productive. For a clearer picture of what RAM actually does, see how memory works on phones and tablets in plain terms.
Myth
More megapixels means a better camera.
Fact
Image quality depends on sensor size, lens optics, and image processing software — not megapixel count alone.
A megapixel is simply a unit of resolution — the number of pixels in an image. A camera with a physically large sensor and a quality lens will generally produce better photos in low light and across a range of conditions than a camera with a high megapixel count but a small, cheap sensor. This is why dedicated cameras with larger sensors often outperform smartphones that advertise higher pixel counts. Image processing algorithms also play a significant role in final photo quality.
Myth
Putting a water-damaged phone in rice will fix it.
Fact
Uncooked rice is a poor desiccant and often delays proper intervention, making damage worse.
Rice does absorb some moisture from the air, but its desiccant properties are weak compared to purpose-made silica gel packets — and far too slow relative to how quickly corrosion can begin inside a wet device. The bigger risk is that the rice myth encourages people to wait 24–48 hours before seeking professional help, during which time mineral deposits from the water can corrode circuit boards. The recommended immediate steps are to power the device off, remove any removable parts, and bring it to a repair professional as quickly as possible.
Myth
Using a charger with higher wattage than the one that came in the box will damage your device.
Fact
Devices regulate how much power they draw; a higher-wattage certified charger will not force excess power into the device.
Wattage ratings on chargers indicate the maximum they can deliver, not the amount they will push regardless of need. Your device's charging controller negotiates with the charger to draw only what it can safely handle — a process standardized under protocols like USB Power Delivery (USB-PD). A phone that supports 20W charging plugged into a 65W charger will still charge at 20W. The important qualifier is that the charger should be certified to relevant safety standards; uncertified or counterfeit chargers are a genuine risk, regardless of their advertised wattage.
What the Evidence Actually Shows
Understanding how your devices are engineered helps you filter good advice from noise. Smartphones, laptops, and tablets are designed by large teams of engineers who anticipate everyday use patterns — including imperfect ones. That means the scenarios people worry about most are often already accounted for in the hardware or software.
~80%
Smartphone users who believe closing apps saves battery
Industry surveys and platform user research consistently find the majority of smartphone users practice force-closing apps despite operating system guidance that it provides no benefit.
2–3 years
Typical lithium-ion battery lifespan with average use
Battery manufacturers generally rate lithium-ion cells for 300–500 full charge cycles before capacity noticeably degrades, which translates to roughly two to three years of everyday use.
If your device is genuinely underperforming, the cause is usually more mundane than the myths suggest. Before replacing a slow device, it's worth understanding what's actually driving the lag. Similarly, if battery life concerns you, the real science behind battery wear is different from what most people assume. And if terms like RAM and storage feel confusing, what storage and memory actually mean is a useful starting point.
Uncertified Chargers Are a Real Risk
While higher wattage from a certified charger is safe, counterfeit or uncertified chargers lack the safety circuitry required to regulate power delivery properly. This can cause overheating, damage to charging ports, or — in rare but documented cases — fire. Look for chargers that carry recognized safety certifications (such as UL listing in the US) and avoid very low-cost chargers from unknown sources.
Misconceptions about gadgets aren't isolated — they mirror myths in other areas of everyday life. Similar patterns appear with common plumbing myths and shopping savings myths. In each case, the fix is the same: check what the evidence shows before acting on received wisdom.