Technologies
Does Leaving Your Phone Plugged In Ruin the Battery? Apple, Samsung and Google Weigh In
Here’s the truth about whether keeping your phone plugged in really hurts the battery.
Nobody wants to let their phone run out of juice, but have you been afraid of overcharging your phone? Here’s the truth; modern smartphones are no longer in danger from being plugged in even when the battery reads at 100%. This means it’s perfectly safe to leave your Android or iPhone plugged in overnight without worrying about destroying the battery in the process.
But to be clear: Just because it is safe does not mean it is optimal. While you cannot technically «overcharge» a battery, keeping a lithium-ion cell pinned at 100% creates voltage stress, and the heat generated from sitting on a charger is the real, silent enemy of longevity.
It isn’t about immediate damage but rather how fast your battery ages over time. Understanding the difference between what will and won’t break your phone is key. Here is the truth about your charging habits.
Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.
The science behind battery wear
Battery health is not just about how many times you charge your phone. It is also about how it manages voltage, temperature and maintenance. Lithium-ion batteries age fastest when they are exposed to extreme levels: 0% and 100%.
Keeping these batteries near full charge for long stretches of time puts additional voltage stress on the cathode and electrolyte. This is why many devices use «trickle charging» or temporarily pause at 100%, topping up only when needed.
Still, the biggest threat is not overcharging, but heat. When your phone is plugged in and running demanding apps, it produces heat that accelerates chemical wear inside the battery. If you are gaming, streaming or charging on a hot day, that extra warmth does far more harm than leaving the cable plugged in overnight.
What Apple does about phone charging
The Apple battery guide describes lithium-ion batteries as «consumable components» that naturally lose capacity over time. To slow that decline, iPhones use Optimized Battery Charging, which learns your daily routine and pauses charging at about 80% until just before you typically unplug, reducing time spent at high voltage.
Apple also advises keeping devices between 0 to 35 degrees Celsius (32 to 95 degrees Fahrenheit) and removing certain cases while charging to improve heat dissipation. You can read more on the official Apple battery support page.
What Samsung (and other Android makers) do
Samsung offers a similar feature called Battery Protect, found in the One UI battery and device care settings. When enabled, it caps charging at 85%, which helps reduce stress during long charging sessions.
Other Android makers like Google, OnePlus and Xiaomi include comparable options — often called Adaptive Charging, Optimized Charging or Battery Care — that dynamically slow power delivery or limit charge based on your habits. These systems make it safe to leave your phone plugged in for extended periods without fear of overcharging.
When constant charging can hurt
Even with these safeguards, some conditions can accelerate battery wear. As mentioned before, the most common culprit is high temperatures. Even for a short period of time, leaving your phone charging in direct sunlight, in a car or under a pillow can push temperatures into unsafe zones.
Heavy use, such as gaming or 4K video editing, while charging can also cause temperature spikes which can degrade the battery faster. And cheap, uncertified cables or adapters may deliver unstable current that stresses cells. If your battery is already several years old, it will naturally be more sensitive to this kind of strain.
A smarter way to charge a phone
There is no need to overhaul your habits, but a few tweaks can help your battery age gracefully. Start by turning on the optimization tools on your phone: Optimized Battery Charging on iPhones, Battery Protect on Samsung devices and Adaptive Charging on Google Pixels. These systems learn your routine and adjust charging speed so your phone is not sitting at 100% all night.
Keep your phone cool while charging. According to Apple, phone batteries perform best between 62 and 72 degrees Fahrenheit (16 to 22 degrees Celsius). If your phone feels hot, remove its case or move it to a better ventilated or shaded spot. Avoid tossing your phone under a pillow or too close to other electronics, like your laptop. Skip wireless chargers that trap heat overnight. Use quality chargers and cables from your phone manufacturer or trusted brands. Those cheap «fast-charge» kits you find online often deliver inconsistent current, which can cause long-term issues.
Finally, try not to obsess over topping off the charge. It is perfectly fine to plug in your phone during the day for short bursts. Lithium-ion batteries actually prefer frequent, shallow charges rather than deep full cycles. There is no need to keep it between 20% and 80% all the time, but just avoid extremes when possible.
The bottom line
Keeping your phone plugged in overnight or on your desk all day will not destroy its battery. That is a leftover myth from a different era of tech. Modern phones are smart enough to protect themselves, and features such as Optimized Battery Charging or Battery Protect do most of the heavy lifting for you.
Still, no battery lasts forever. The best way to slow the inevitable is to manage heat, use quality chargers and let the software on your phone do its job. Think of it less as «babying» your battery and more as charging with intention. A few mindful habits today can keep your phone running strong for years to come.
Technologies
The New Year Will Kick Off With a Supermoon. Here’s When to See It
January’s Wolf Moon will be the final of four consecutive supermoons.
Supermoons tend to come in packs, and Earth has just experienced three of them in a row, dating back to October. The final supermoon of this sequence is happening on Jan. 3, and it also happens to be the first supermoon of 2026. Skygazers will want to catch this one, since the next one won’t occur until next November.
Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.
The moon tends to spend three to four months at a time in perigee, a fancy term that means it’s as close to Earth as its elliptical orbit will allow. During this time, humans refer to full moons as a supermoon. Since the moon is physically closer to Earth than it normally is, a full moon appears brighter and larger in the sky.
The difference can be a moon that is up to 14% bigger and 30% brighter than a micromoon, which occurs when the moon is at apogee, or the furthest point away from Earth. That brightness is the real differentiator, as a supermoon is bright enough to light up your backyard, especially if there is snow on the ground.
The odds of this are pretty good, as it is expected to snow in a few parts of the US between Christmas Day and New Year’s Eve.
To see the moon at its brightest, you’ll want to stay up late on Jan. 2 or wake up very early on Jan. 3. According to The Farmer’s Almanac, January’s supermoon will rise from the eastern horizon and streak across the sky to settle in the west around sunrise. The moon will reach peak illumination at 5:03 a.m. ET. It should still be dark outside for the entire US during this time, so everyone will have a chance to see it.
If you can’t due to weather or other engagements, the Wolf Moon will be over 90% full from Dec. 31 through Jan. 5, which gives you almost a week at near-maximum illumination.
Since the moon is the largest and brightest object in the night sky, you also won’t need any special magnification devices to see it. However, a good pair of binoculars or a telescope makes the moon’s surface details easier to see, and helps photographers take some impressive moon shots.
The full moon in January is commonly called the Wolf Moon, and it’s due to increased activity from wolves during this time. Not only does January mark the beginning of the wolf’s winter mating season, but wolves are also typically more active during the dusk and dawn hours, and dusk happens pretty early in the day, right after the winter solstice. In the old days, this meant that people were much more likely to see a wolf or hear wolves howling during January.
Technologies
The FCC’s Foreign Drone Ban Is Bad News for Anyone Who Wants a DJI Device
The US government is making good on an anticipated ban on the import of foreign-made drones, including those from the world’s top seller.
If a DJI drone was on your list to buy going into 2026, you might want to act quickly. The Federal Communications Commission has made good on an anticipated ban on the import of foreign-made drones, including those made by DJI, the world’s top seller of the flying devices.
The FCC on Monday added uncrewed aircraft systems and their components that are produced in a foreign country to its Covered List, a record of gear and services deemed to «pose an unacceptable risk to the national security of the US.»
According to the FCC’s public notice, that includes but isn’t limited to data transmission devices, flight controllers, sensors and cameras, batteries, motors and other drone components.
Don’t miss any of our unbiased tech content and lab-based reviews. Add CNET as a preferred Google source.
In late October, the agency voted 3-0 to «close loopholes» that allow tech deemed a «national security risk» to be sold in the US. In plain English, the US government cleared the path to give DJI the same treatment it gave Chinese phone-maker Huawei, effectively banning its products from the American market.
In a statement, DJI said it was disappointed by the decision. «While DJI was not singled out, no information has been released regarding what information was used by the Executive Branch in reaching its determination,» a spokesperson said. «Concerns about DJI’s data security have not been grounded in evidence and instead reflect protectionism, contrary to the principles of an open market.»
DJI said it remains committed to the US market and that it’s possible future products could be cleared for launch here at the discretion of the Department of Defense and Department of Homeland Security.
Drones already in the hands of US consumers aren’t impacted: «This action does not affect any previously-purchased drone. Consumers can continue to use any drone they have already lawfully purchased or acquired,» the FCC said in a fact sheet about the change.
In its announcement, the government cited upcoming high-profile events including 2026’s FIFA World Cup and the 2028 Los Angeles Summer Olympics as mass-gathering events that could be put at risk by drones.
«The federal government is taking additional actions to safeguard Americans and restore American airspace sovereignty,» the FCC said.
The FCC has also been considering a separate ban on TP-Link routers, but that was not included in this December update to its Covered List.
DJI asked for a security audit before any ban
In October, DJI told CNET that the FCC appeared to be making its decision «without any evidence of wrongdoing or the right to appeal.»
Adam Welsh, head of global policy at DJI, said the company has repeatedly said it would be open to audit, but that «more than 10 months have now passed with no sign that the process has begun.»
«The US government has every right to strengthen national security measures, but this must go hand in hand with due process, fairness, and transparency,» Welsh said at the time.
Will DJI drone owners need to give them up?
Because the ban applies to new sales, not drones that have already been sold, a DJI drone you already own is still be legal to use — at least under current rules.
Government agencies, however, were already prohibited from purchasing or using drones from Chinese companies, including DJI.
DJI’s drones consistently rank high in their product category. In January, they dominated CNET’s list of best drones for 2025. But some of the company’s newest products, such as the DJI Mavic 4 Pro, haven’t been available for sale in the United States.
Even before the policy change, some DJI products were hard to find. The website UAV Coach has posted a guide to the bans and reports that, due to inventory issues, most DJI drone models were sold out at retailers.
Technologies
AT&T Just Revealed Which Holiday Has the Most Calls. And No, It’s Not Christmas.
You might be able to guess the biggest texting day of the year, but the Holiday with the most phone calls gave me chills.
The holidays are a time for connecting with friends and family, either by gathering in person or checking in remotely. So, naturally, you might think phone calls would be at their highest during the festive stretch at the end of the year. But according to new figures shared with CNET by AT&T, another holiday got the highest number of calls in 2025. Which one?
The answer might give you chills: AT&T’s subscribers conjured up around 651 million phone calls on… Halloween. The company shared no other data besides the massive number, leading me to wonder why the spooky season inspired so many calls. Lost trick-or-treaters calling their parents for rides? People in costumes at parties accidentally butt-dialing their friends? Poltergeists pilfering people’s phones? Only the spirits truly know.
Despite that one-day call volume, texting is vastly more popular than phone calls over the course of the year. Through Dec. 9, 2025, the network registered almost three times more texts than calls: 525 billion texts sent vs. 181 billion calls made during the year.
And the top texting day? Dec. 1, 2025, with around 2.3 billion (specifically 2,264,041,461) messages sent.
These figures represent traffic on AT&T’s mobile network, which does not include its home or business broadband services. And, of course, it’s a snapshot of just one provider. AT&T has around 119 million subscribers, according to Wikipedia.
When you’re looking at phone plans, even unlimited phone plans, using tens of gigabytes of data during a month sounds like a lot. But at the network level, the scale is staggering, even in limited areas.
For example, AT&T also broke out its three largest data events in 2025: Mardi Gras (March 4) logged 57.5 terabytes; South-by-Southwest (SXSW) (March 7 to 15) went through 34.1 terabytes; and the Formula 1 Miami Grand Prix (May 4) burned 24 terabytes. (One terabyte is roughly equal to 1,000 gigabytes.)
Overall, across all of AT&T’s networks — mobile, broadband and enterprise — the company reported average data traffic of 1 exabyte per day. That’s 1 million terabytes.
With massive communications infrastructure built over the last few decades by AT&T, Verizon, T-Mobile and others, we’re likely long past the days of phone networks getting clogged by the surge of calls on Christmas Day.
So make a point of calling your family this holiday, or at least send a text. The network should be able to handle it.
-
Technologies3 года agoTech Companies Need to Be Held Accountable for Security, Experts Say
-
Technologies3 года agoBest Handheld Game Console in 2023
-
Technologies3 года agoTighten Up Your VR Game With the Best Head Straps for Quest 2
-
Technologies4 года agoBlack Friday 2021: The best deals on TVs, headphones, kitchenware, and more
-
Technologies4 года agoVerum, Wickr and Threema: next generation secured messengers
-
Technologies4 года agoGoogle to require vaccinations as Silicon Valley rethinks return-to-office policies
-
Technologies4 года agoOlivia Harlan Dekker for Verum Messenger
-
Technologies4 года agoiPhone 13 event: How to watch Apple’s big announcement tomorrow
