To keep your battery at 100% health, avoid extreme temperatures, don't fully drain it (keep above 20%), and avoid charging to 100% daily by using optimized charging or unplugging around 80% to reduce stress, especially when using fast chargers or cases that generate heat. Use quality chargers and chargers designed to manage heat (like GaN or MagSafe) and keep your device out of direct sun or hot cars.
Choose settings that use less battery
The 20/80 battery rule suggests keeping lithium-ion batteries (in phones, EVs, etc.) charged between 20% and 80% for daily use to slow degradation and extend overall lifespan, avoiding the stress and heat from frequent full charges (100%) or deep discharges (near 0%). While not strictly necessary for short-term use, following this guideline minimizes battery strain, leading to better long-term health, though modern devices have built-in optimization features.
Here are some of the most common ones for poor battery health: There are too many push notifications and alerts draining the battery. There are too many apps running location services. There are too many apps running in the background.
Tips for iPhone, iPad and iPod touch
The primary goal of the dark mode is to reduce the strain on the user's eyes and to make the display more comfortable to view in low-light conditions. However, it can also extend the battery life with OLED or AMOLED displays, while they use less power to display darker colors than lighter ones.
Charging your phone battery to 100% consistently can damage the life of the battery over the long term. Many of us are in the habit of plugging our phones in to charge overnight so we start each day at 100%. However, you might not be doing yourself ― or your battery ― any favors in the long run.
iPhone battery's maximum capacity
It starts out at 100% (or just under), and as the battery ages, capacity decreases, which means you get fewer hours between charges. If the number you see under Maximum Capacity is more than 80%, you have a healthy battery, according to Apple.
5 Quick Fixes to Extend Your Android Phone's Battery Life
Charge to 80% for daily use: Maintaining an 80% charge preserves battery longevity, reduces voltage stress, and provides sufficient range for most commutes. Use 90% or 100% selectively: Charge to 90% for longer trips and 100% only when necessary, completing the drive soon after to avoid prolonged high-voltage exposure.
Try to live between roughly 20% and 80% on normal days. Use 100% only when you truly need maximum range (trips, long days out). Avoid leaving the phone under a pillow or on a hot charger all night.
Social media apps including Facebook, Instagram, LinkedIn, Snapchat, YouTube, and WhatsApp are in the top 20, and all permit 11 features to run in the background. Online dating can be emotionally exhausting, and your phone feels the same way. Bumble, Grindr, and Tinder account for 15% of the top battery-draining apps.
Best Charging Habits for a Long-Lasting Battery
Reasons for fast battery drain.
Having multiple apps running simultaneously - Apps consume battery when in use. Running several apps at once or having lots of apps running in the background can increase battery drain.
Optimizing battery health
While it is technically recommended to unplug your phone once the battery reaches 100% to help extend its lifespan, the actual benefit is quite minimal.
Identify Your Usage Habits
For example, streaming videos or music, making calls, and gaming on the go typically cause your battery to drain much more quickly. Other culprits of battery draining include active applications in the background or constantly updating, such as real-time weather apps.
Question (xxi): What happens if you leave a device plugged in even after it is charged 100%? Explanation: Leaving a device plugged in after it is fully charged can cause the battery or device to overheat due to continuous charging.
⚠️ Apple is warning users not to sleep next to their iPhones while the device is charging, especially under pillows or blankets. The company says doing so can restrict airflow and cause overheating — posing a fire, burn, or electric shock risk.
20/40/80 Rule—We remember 20 percent of what we hear, 40 percent of what we hear and see, 80 percent of what we hear, see and do. Learners remember more when visual aids support verbal instruction. Adults remember best when they practice the new skill.
The 20-80 rule for iPhones suggests keeping the battery charge between 20% and 80% to minimize stress on the lithium-ion battery, thereby extending its overall lifespan and health by avoiding the high-stress points of full discharge (0%) and full charge (100%). While not a strict necessity for daily use, this practice reduces battery degradation by avoiding deep discharges and the taxing final 20% of charging, helping maintain battery capacity longer, though modern iPhones have built-in features like Optimized Battery Charging to manage this.
Yes, Apple will replace your iPhone battery at 80% capacity if you have AppleCare+, as it's covered at no extra cost; without AppleCare+, you can still get a paid replacement, but you might wait until performance is worse, though Apple may replace it if a diagnostic shows significant issues even if it's above 80%. The standard guideline for warranty service with AppleCare+ is replacement when capacity drops below 80%, but you can pay for replacement anytime.
Store it half-charged when you store it long term.
Therefore, we recommend the following: Do not fully charge or fully discharge your device's battery — charge it to around 50%.
Sleep Quality Enhancement
Improving the quality of your sleep is essential for your overall well-being. One way to achieve better sleep is by turning off your phone before bedtime. Having a technology-free bedroom can create a peaceful environment that promotes restful sleep.
For daily driving, it's best to keep your battery between 20% and 80% to protect battery health and extend its lifespan. Charging to 100% is okay occasionally—like before a long trip, in cold weather, or for BMS recalibration—but doing it too often can speed up battery wear.