Technologies

Is Leaving Your Phone Plugged In Bad for the Battery? Apple, Samsung and Google Weigh In

If you leave your phone plugged in overnight, here’s what manufacturers say you should know.

If you’re still sprinting to unplug your phone the second it hits 100% because you’re terrified of «overcharging,» you can officially relax. That advice is ancient history. Modern smartphones are smart enough to cut off the power once they’re fully charged, so leaving your iPhone or Android plugged in overnight isn’t going to destroy the battery.

But let’s be clear: Just because it’s safe doesn’t mean it’s optimal. While you can’t technically overcharge the battery, keeping a lithium-ion cell pinned at 100% creates voltage stress, and the heat generated from sitting on a charger is the real enemy of longevity.

It’s not about immediate damage; it’s about how fast your battery ages over time. Understanding the difference between what won’t break your phone and what will actually help it last is key. Here’s the truth about your charging habits.

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The science behind battery wear

Battery health isn’t just about how many times you charge your phone. It’s about how it manages voltage, temperature and maintenance. Lithium-ion batteries age fastest when they’re exposed to extreme levels: 0% and 100%.

Keeping them near full charge for long stretches puts additional voltage stress on the cathode and electrolyte. That’s why many devices use «trickle charging» or temporarily pause at 100%, topping up only when needed.

Still, the biggest threat isn’t overcharging — it’s heat. When your phone is plugged in and running demanding apps, it produces heat that accelerates chemical wear inside the battery. If you’re gaming, streaming or charging on a hot day, that extra warmth does far more harm than leaving the cable plugged in overnight.

Apple’s take

Apple’s 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 Apple’s official battery support page.

What Samsung (and other Android makers) do

Samsung offers a similar feature called Battery Protect, found in One UI’s 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 temperature. 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 while charging, like gaming or 4K video editing, can also cause temperature spikes that 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’s naturally more sensitive to this kind of strain.

How to charge smarter

You don’t need to overhaul your habits but a few tweaks can help your battery age gracefully.

Start by turning on your phone’s built-in optimization tools: 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 isn’t 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 it under a pillow or too close to other electronics, like your laptop, and skip wireless chargers that trap heat overnight.

Use quality chargers and cables from your phone’s manufacturer or trusted brands. Those cheap «fast-charge» kits you find online often deliver inconsistent current, which can cause long-term issues.

Finally, don’t obsess over topping off. It’s 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. You don’t 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 won’t destroy its battery. That’s a leftover myth from a different era of tech. Modern phones are smart enough to protect themselves, and features like 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 your phone’s software 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.

Technologies

Roblox Rolls Out Age-Verification Requirement for Chat Amid Child Safety Criticism

The age-verification tool estimates a player’s age to put them into a specific group before they can chat online.

Roblox, the online gaming platform that has been under fire due to child safety concerns, has introduced age-verification software that uses facial scanning to estimate the age of players.

The system is currently voluntary, but by the first week of December it will be a requirement in Australia, the Netherlands and New Zealand in order for players to chat with others online. By early January, players in all Roblox markets, including the US, will be required to use the software if they want to engage in chats with other players. Roblox said it has also launched a Safety Center hub with information for parents and parental control tools.

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Roblox says the age-verification system is being put in place to limit contact between adults and children, which has been a chief concern among child-safety advocates.

However, while some experts expressed optimism about Roblox’s changes, they disagreed on whether the new features go far enough for the platform and whether Roblox’s reputation can be repaired.

How it works

Roblox’s new age-verification feature takes a 3D scan of a player’s face, using a webcam or a mobile device’s camera, to estimate the person’s age. Based on that estimate, a player can use online chat with other players in their age group.

In a video about the software, Roblox says it immediately deletes captured images or video after the age check is complete.

The age check is performed by a vendor of Roblox called Persona.

Once they complete the check, players are grouped into the following age categories: under 9, 9–12, 13–15, 16–17, 18–20, or 21 and over. The company said that those under 9 won’t be allowed to chat without parental permission. The chats won’t be strictly limited to those age groups, necessarily. Roblox said players «can chat only with peers in their group or similar groups, as appropriate.»

A representative for Roblox said in an email to CNET that the technology should not be considered facial recognition because it’s not being used to identify a particularly person, only to estimate their age.

The company said it’s also taking measures such as restricting media sharing among players and using AI to monitor chats.

Ongoing controversy

One of the aims of the launch, which was first announced in the summer, was to address criticism that the platform has not adequately protected underage Roblox players. The criticism comes at a time when Roblox is more popular than ever, having broken its own records this year for the number of players on its platform at the same time. It’s estimated to have about 380 million active monthly users.

Roblox is currently facing dozens of lawsuits related to claims of sexual abuse and child exploitation from families of children who played Roblox. It is also the target of investigations or lawsuits from states including Florida, Texas, Louisiana and Kentucky.

Roblox was dealt a setback earlier this month when a California judge declined the company’s motion to move one of these suits into private resolution.

The company says its safety features are moving beyond what other game platforms offer to protect minors.

According to a corporate post about the safety features: «Roblox is the first online gaming or communication platform to require facial age checks to access chat, establishing what we believe will become a new industry standard.»

The online streaming platform Twitch is also introducing an age scan feature, but so far only in England.
In response to the Roblox and Twitch changes, Anna Lucas, online safety supervision director at the British regulatory agency Ofcom, said, «We’re pleased that children will be better protected from harmful material and predators on Twitch and Roblox. Under the UK’s online safety laws, platforms must now take steps to keep kids safe, and we’re ensuring they meet their responsibilities. There’s more to do, but change is happening.»

What’s next for Roblox?

Experts CNET spoke with in areas including child privacy and safety, online marketing and tech viewed the steps Roblox is taking as positive, But there’s wide disagreement on whether the company is going far enough with its protections.

«Roblox’s new age-verification tools are encouraging, but from a parenting standpoint, they’re just one part of the safety puzzle,» said Dr. Scott Kollins, a clinical psychologist and chief medical officer at Aura, an online safety app. «The real question for families is whether these features meaningfully improve kids’ day-to-day experience on the platform. Age verification is a step forward, but children still need guardrails and clear explanations about how online interactions work.»

Kollins said that active parenting needs to take place before kids log on to Roblox in addition to the company designing its product with safety in mind.

Stephen Balkam, founder and CEO of the Family Online Safety Institute, called the age-verification «a hugely important step» in the direction of making Roblox a safer platform. He said he hoped other online platforms might follow Roblox.

«My only hope is that in the long term, Roblox’s age assurance methods become interoperable with other gaming and kid-focused sites and platforms, so parents and kids only have to go through the verification process once,» Balkam said.

Like Kollins, Balkam emphasized the importance of parental involvement, since no site is entirely safe.

«Set family rules, use parental controls and have regular conversations with your kids,» he said. «So, no, don’t ban Roblox, but use their industry-leading tools and keep the lines of communication open and your kids should be able to have a fun and creative time.»

Liability and trust

Some experts also view the changes as a way to mitigate the company’s reputational damage and address legal challenges.

The age verification is «not a silver bullet,» said Paromita Pain, associate professor of media studies at the University of Nevada, Reno.

«Even a very strong safety revamp doesn’t erase that record, but it does give Roblox a narrative: ‘We heard you, we’re now at or above industry standard, so future risk is sharply reduced,’ » Pain said.

The moves, Pain said, could rebuild trust, but many parents will see age checks as coming too late. Pain said that the company should adopt independent audits of child-safety practices, make its parental and teen controls stricter by default and commit to «safety by design» by making systemwide changes on private servers and environment designs.

The current changes won’t fix things for Roblox, she said. «Only sustained, independently-verifiable changes—and probably some large settlements—will do that.»

Technologies

Waymo Is Going Fully Autonomous in 5 New Cities. Everything to Know About the Robotaxi

Here’s everywhere the self-driving company operates and where it’s headed soon.

Technologies

Today’s NYT Connections: Sports Edition Hints and Answers for Nov. 19, #422

Here are hints and the answers for the NYT Connections: Sports Edition puzzle for Nov. 19, No. 422.

Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.

Today’s Connections: Sports Edition features a blue category that I think is a real stumper, unless you’re familiar with one certain phrase. If you’re struggling but still want to solve it, read on for hints and the answers.

Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.

Read more: NYT Connections: Sports Edition Puzzle Comes Out of Beta

Hints for today’s Connections: Sports Edition groups

Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.

Yellow group hint: Splish-splash.

Green group hint: Hoopsters.

Blue group hint: Get in shape.

Purple group hint: Vroom-vroom.