Preserve the Battery of Your iPhone and Mac

The battery that drains quickly, the anxiety of having no phone battery left by the end of the day, the autonomy that seems to decrease with the months: battery life is a major concern for all iPhone, iPad, or Mac users. Good news: a few settings and good habits can both improve daily autonomy AND preserve the battery’s health in the long term. Without myths or false beliefs, here’s how to get the most out of your batteries and make them last.

Two distinct issues: autonomy and health

You need to distinguish two things often confused: AUTONOMY (how long your device lasts on a charge — what worries you daily) and BATTERY HEALTH (its wear over the YEARS, which gradually reduces its maximum capacity). While both are worked on, they are approached differently. For DAILY AUTONOMY, it’s about reducing what consumes: the SCREEN (the biggest consumer), background applications, location, notifications, etc. For LONG-TERM HEALTH, it’s about avoiding what prematurely wears out the battery: mainly extreme temperatures and certain charging uses. Understanding this distinction avoids many misunderstandings: improving daily autonomy and preserving the battery for the years to come do not always require the same actions. A reassuring point: a battery wears out naturally over time (that’s normal), but good habits significantly slow down this wear; and when a battery is really tired after several years, REPLACING it (on a device that still works well) is often much more economical and eco-friendly than changing the device (our guides on extending device life). Let’s see concretely how to act on these two fronts.

Improving daily autonomy

The most effective levers for lasting longer on a charge: the SCREEN — the biggest consumer: lower the brightness (or let the automatic adjustment), reduce the delay before automatic locking, and the dark mode can help on some screens; BACKGROUND APPLICATIONS — some consume even when closed; settings allow you to see which applications use the most battery and limit their background activity; LOCATION — applications that access your position constantly consume; limit this access to those that really need it (our guides on managing permissions); NOTIFICATIONS — each screen wake-up consumes; reducing unnecessary notifications helps (and improves your serenity — our guides on focus modes); the ENERGY SAVING MODE — activate when the battery drops (it automatically reduces consumption): you can even automate it (our guides on iPhone automation); and the CONNECTIONS — turning off what is not needed at a given moment can help marginally. Your device’s settings include a very useful BATTERY section: it shows which applications consume the most, allowing you to target the real energy drains. Often, one or two power-hungry applications explain a large part of the consumption: identifying and limiting their background activity can significantly improve your autonomy. There’s no need to fiddle with everything: a few targeted settings (brightness, power-hungry applications, location, energy-saving mode) are enough to gain precious time in a day.

The good reflex. Check the BATTERY section in your device’s settings: it shows precisely which applications consume the most energy. Often, one or two power-hungry applications (due to their background activity, location or network usage) explain a large part of your consumption. Once identified, you can limit their background activity, restrict their location access, or review their notifications — this targeted approach is much more effective than randomly tweaking dozens of settings. Activate the ENERGY SAVING MODE as soon as the battery drops (or automate it under a certain threshold: our guides on iPhone automation). These two actions — identifying power-hungry applications and using the energy-saving mode — are the most profitable for improving daily autonomy: you act where the consumption really is, rather than fumbling. A few minutes of analysis for hours of gained autonomy.

Preserving the battery’s health in the long term

To slow down wear and make the battery last for years, some well-founded principles (far from myths): TEMPERATURE is the number one enemy — heat is what most wears out a battery: avoid exposing your devices to direct sunlight, leaving them in a car in the summer, or overheating them (our guides on overheating computers); extreme cold also harms temporarily; keeping the device at moderate temperature is the most protective gesture; MODERATE CHARGING — modern batteries don’t like staying constantly at 100% or regularly dropping to zero; recent Apple devices offer OPTIMIZED CHARGING functions (which learn your habits and avoid maintaining the battery at full charge unnecessarily, or cap the charge); keep these functions activated, they automatically preserve the battery; UPDATES — the system manages the battery better over time; BATTERY HEALTH TRACKING — settings show the battery’s health status (its remaining maximum capacity): monitor it to know where your battery stands. Some MYTHS to dispel: no, you don’t need to « completely drain » the battery regularly (it was true for old technologies, but not today); no, leaving it to charge overnight is not dramatic with optimized charging functions; and using the device while charging is possible (but avoid overheating it). When the battery is really worn out (after several years, the maximum capacity has dropped significantly, autonomy has collapsed): replacing the battery gives a second life to a device that still works very well — often much more economical and eco-friendly than changing the device (our guides on extending device life, fighting obsolescence). Preserving the battery is mainly about keeping it cool and letting the optimized charging functions do their job: simple gestures for a battery that lasts.

Caution: heat damages the battery, and beware of dubious accessories. The most important point for the BATTERY HEALTH of your device: TEMPERATURE. Heat is what most wears out a battery: absolutely avoid exposing your devices to direct sunlight, leaving them in a car in the summer, or overheating them (our guides on overheating computers); this is the main cause of premature wear. Keep the OPTIMIZED CHARGING functions of your Apple devices activated: they preserve the battery without effort on your part. Be wary of very cheap CHARGERS and cables from dubious sources: not only can they be ineffective, but non-compliant chargers can present risks (overheating, poor quality) and damage the battery; prefer quality equipment, adapted to your device (our guides on slow charging phones). Finally, don’t fall for counterproductive myths (completely draining the battery regularly is no longer recommended). And when a battery is really tired after years, think about BATTERY REPLACEMENT rather than replacing the device: more economical and eco-friendly (our guides on extending device life). Keep your devices cool and use quality equipment: that’s the key to a battery that lasts.

Frequently asked questions

How to improve daily autonomy?

Target the big consumers: lower the screen brightness (the first item), check the Battery section in settings to identify power-hungry applications and limit their background activity, restrict location access to applications that really need it, and reduce unnecessary notifications. Activate the ENERGY SAVING MODE as soon as the battery drops (you can automate it under a certain threshold). Often, one or two applications explain a large part of the consumption: identifying and limiting them is the most effective action. There’s no need to fiddle with everything: a few targeted settings are enough to gain precious time in a day.

Should I completely drain the battery regularly?

No, it’s an outdated MYTH: it was true for old battery technologies, but modern batteries don’t need it and in fact don’t like it when they regularly drop to zero or stay constantly at 100%. Let the OPTIMIZED CHARGING functions of your devices do their work automatically. The real enemy of the battery is not the level of charge but HEAT: keep your devices at moderate temperature (avoid direct sunlight, overheated cars). Forget old beliefs: the best preservation comes from keeping the device cool and letting the smart charging functions do their work.

My battery drains quickly after a few years, what should I do?

It’s natural wear: after several years, a battery’s maximum capacity decreases (check its health status in settings). If autonomy has collapsed but the device still works well, REPLACE the battery rather than changing the device: it’s often much more economical and eco-friendly, and gives a second life to your device (our guides on extending device life, fighting obsolescence). Good habits (keeping the device cool, letting optimized charging functions run) slow down the wear, but a battery eventually wears out: battery replacement is then the smart solution. Keep your devices cool and use quality equipment: that’s the key to a battery that lasts.

What to remember

The battery is worked on on two distinct fronts. For DAILY AUTONOMY: reduce consumers — lower the screen brightness (the first item), identify power-hungry applications in the Battery section of settings and limit their background activity, restrict location, reduce notifications, and activate (or automate) the energy-saving mode. Often, one or two applications explain the bulk of the consumption: targeting them is the most effective action. For LONG-TERM HEALTH: avoid HEAT (the number one enemy: no direct sunlight, no overheated cars), keep the OPTIMIZED CHARGING functions activated (which automatically preserve), keep the system updated, and track the battery’s health. Dispel myths: completely draining the battery is no longer recommended, and overnight charging is not dramatic with optimized charging. Be wary of dubious chargers. And when a battery is really worn out after years, REPLACING it (on a device that still works well) is more economical and eco-friendly than changing the device. Keep your devices cool and let the smart functions work: that’s the key to a battery that lasts.