You Can Extend Your Phone’s Battery With a Few Settings and a Wallpaper Change


Improving battery life on a phone is often a big focus, especially as we increasingly use our phones for everything from watching movies to experimenting with generative AI features. And we know people are looking for solutions to help extend their battery life, whether it’s finding new phones with better batteries or making use of power banks. A CNET survey from May 2026 found that 58% of smartphone owners are frustrated with their device’s battery life. In fact, longer battery life (52%) is the second biggest driver (after price at 55%) of their decision to get a new phone.

But as phones and other electronics keep getting more expensive, you may want to look into other ways to get more use out of the phone that you have — including ways to improve its battery life. The good news is that if your phone happens to have an OLED or AMOLED display, there are a few simple tweaks you can make to help cut down on how fast its battery drains to power that screen. And there’s a good chance you indeed have a phone with this type of screen tech: According to a Counterpoint Research report from May, about 87% of smartphones in the US do. 

Can these two settings really help save battery on OLED smartphones?

The Dumb Phone app running on the iPhone Air.

A dark wallpaper on an OLED display phone can help save battery.

Prakhar Khanna/CNET

The display is the most active part of your smartphone — and to save battery, we need to find ways to reduce its workload. An easy way to do this is by adding a black wallpaper and enabling dark mode on your device.

The OLED panel then draws very low power because of its structure. It works on a per-pixel basis as opposed to having a constant backlight to light up the pixels (LCD), which consumes around 30% higher average current than Dynamic AMOLED, according to a paper published in IEEE.

If you add a black background to your homescreen, it will turn off most pixels on an OLED-equipped smartphone, allowing it to last longer on a single charge. Some might believe it to be a myth, but according to another research paper from IEEE, black color consumes the lowest power (~250 mW). In comparison, white is the most power consuming color on an OLED display, taking up around 1,250 mW of energy from the battery.

You’ll notice a significant difference in battery efficiency between light mode and dark mode when you’re using the phone in direct sunlight. With the brightness cranked up to the maximum, dark mode (and its dark background on apps) consumes significantly less power, as compared to light mode and its white background.

However, setting a deep black background on the home screen could result in higher contrast and readability issues for some people. A 2025 study from the University North, Croatia, found that the background color on a digital system has a significant effect on readability. It found a specific shade of dark grey (#121212) to “significantly reduce the number of reading errors,” whereas dark blue (#15202B) led to faster reading of text.

If you want the best of efficiency and readability on your OLED display smartphone, you should opt for a dark grey background in dark mode. Here’s how to set up both settings on your iPhone or Android device.

How to turn on dark mode on an iPhone

Dark mode settings on the screen of iPhone 17 Pro Max.

You can enable dark mode on an iPhone by going to Settings > Display & Brightness > Dark.

Prakhar Khanna/CNET

All current iPhone models on the market — from the iPhone 17E to the iPhone 17 Pro Max — have an OLED display. That means you can turn on dark mode to save battery on your iPhone. This also includes most iPhone models released since the iPhone 12 line, barring the iPhone SE. Here’s how you can find and enable this setting:

  1. Go to Settings.
  2. Scroll down to Display & Brightness.
  3. Select Dark to turn on the dark mode.

However, not everyone likes dark mode at all times. I prefer my iPhone to be in light mode during the day, so I’ve scheduled dark mode from 6 p.m. to 11 a.m. on my device. You can set it up to turn on automatically at your preferred time by simply switching a toggle and adding a schedule. Here’s how: 

  1. Go to Settings > Display & Brightness.
  2. Below the Light and Dark options, there’s an Automatic toggle. Turn it on.
  3. Tap Options and set your preferred schedule.

If a schedule doesn’t work for you, I recommend adding a dark mode toggle in the Control Center for easy access. This way, you can simply swipe down from the top of your home screen and turn on dark mode with a tap. To do this:

  1. Open Control Center on your iPhone.
  2. Touch and hold a blank space on it.
  3. You’ll find an Add a Control option at the bottom of the screen. Tap on it.
  4. Search for Dark Mode and tap on the setting.
  5. Drag and drop the icon where you want to place it in the Control Center.
  6. Tap anywhere in the blank space to save this position.

How to add a black or dark wallpaper on an iPhone

Before you go through the following steps, you first should find a dark wallpaper that you’d like to use. There are many options out there, whether you find one with a solid background or a nearly black wallpaper with some designs. When you pick the wallpaper you’d like, download and save the image to your iPhone. Once you’ve done so, you’re now ready to add a dark background to your home screen and lock screen. Here’s how:

  1. Go to Settings.
  2. Scroll down to find Wallpaper and tap on it.
  3. Tap on Photos and select the image you just saved.
  4. If you want, you can customize it with widgets. Once done, tap on Add.
  5. Tap on Set as Wallpaper Pair, so it’s added to both your home screen and lock screen.

You’re now all set! The combination of dark mode and near-black background should help your iPhone last longer on a single charge.

How to turn on dark mode on an Android phone

Prakhar Khanna holding a half-folded Galaxy Z Fold 7.

You can enable dark mode on Android phones by going to Settings > Display > tap on Dark.

Prakhar Khanna/CNET

The settings menu on an Android phone can vary based on the brand you’re using. For instance, the setting could be placed under a different menu on a Samsung Galaxy phone versus a Google Pixel device. However, it’ll always be some variation of going to Settings > Display and turning on the Dark theme toggle. A few Android manufacturers, including OnePlus and Oppo, have them under Settings > Display & brightness > Dark, similar to the Apple iPhone.

You can enable dark mode on your Android phone by following these steps:

  1. Go to Settings.
  2. Scroll to find Display or Display & touch, depending on the phone.
  3. Tap on Dark.

Like the iPhone, you can schedule dark mode on your Android phone. I’ll break it down into two broad categories:

Schedule dark mode on Samsung Galaxy phones:

  1. Go to Settings > Display.
  2. Under Light and Dark, you should find the Dark mode settings option. Tap on it.
  3. Select Turn on as scheduled.
  4. Tap on Custom Schedule. This will allow you to add your preferred time to this setting.

Schedule dark mode on Google Pixel phones:

  1. Go to Settings > Display & touch.
  2. Tap on Schedule.
  3. Now, you can add a custom time by selecting Turns on at custom time.
  4. Add your preferred time to automatically turn on dark mode every day.

How to add a black or dark wallpaper on an Android phone

The Pixel 7 Pro from the front against a wooden background.

Adding a dark wallpaper can improve battery life on an older phone, too.

Lisa Eadicicco/CNET

Like other settings, changing a wallpaper differs from one Android phone to another. Some might also offer solid color options, so you don’t need to download this image. But for the sake of this tutorial, I’ll stick to a single process. I recommend saving the image to your gallery.

To change the wallpaper on your Android phone:

  1. Long-press on a space on your home screen.
  2. Tap on Wallpapers at the bottom.
  3. Select Choose a photo (this option might vary depending on your phone. Tap on the option that allows you to select a photo from the gallery).
  4. Select the recently downloaded photo.
  5. Tap Preview > Apply.

Like the iPhone, you can always add widgets and adjust the look of your clock after setting this wallpaper. Your Android phone is now all set to save battery through display efficiency.





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Recent Reviews


There’s a special kind of panic that hits at 11 p.m. on a Tuesday when you Google “can someone sue me personally for my freelance business” and the answer is, technically, yes. I know this because I lived it. For fourteen months, I ran a growing consulting side hustle- invoices, contracts, the whole act- under exactly zero legal structure. I didn’t choose to be a sole proprietor. I just never chose to be anything else, which, it turns out, is the same thing.

The wake-up call came from a client’s offhand comment about “your LLC,” followed by my very convincing silence. That night I fell into a research hole so deep I emerged the next morning having read seventeen tabs on liability shields, self-employment tax, and something called “piercing the corporate veil” that sounded like a phrase from a divorce lawyer’s memoir. So: is a sole proprietorship secretly a ticking time bomb? Is an LLC the adult, responsible choice, or just expensive paperwork with better branding? Let’s actually work through it.

What Is a Sole Proprietorship, Really?

Here’s the part nobody tells you clearly: if you’re earning money from your own business activity and haven’t filed anything with your state, you’re already a sole proprietor. There’s no form to submit, no fee to pay, no ceremony. You and the business are, legally, the same person. That’s the whole structure.

The upside is real. It’s the fastest, cheapest way to start working for yourself — no filing fee, no separate tax return, no annual report to remember. You just start invoicing. The downside is baked into that same simplicity: there’s no legal wall between your business and your personal life. If the business owes money or gets sued, the business is you, so your savings account, your car, and potentially your house are all fair game.

What Does an LLC Actually Protect You From?

A Limited Liability Company creates a separate legal entity- one that can own things, owe things, and get sued, largely independent of you personally. That separation is the entire point of forming one.

It’s worth being honest about the limits, too. An LLC won’t protect you if you personally guarantee a business loan, if you commingle business and personal funds, or if you’re personally negligent — say, you’re a contractor and you cause an injury through your own carelessness. Courts can “pierce the corporate veil” and go after your personal assets anyway if you treat the LLC as a legal fiction rather than a real, separately run entity. The protection is genuine, but it’s not a force field; it’s a structure you have to maintain.

Which One Actually Costs More to Start?

This is where a lot of the fear around LLCs turns out to be overblown, and a lot of the assumed simplicity of sole proprietorships turns out to be incomplete.

Sole Proprietorship LLC
Setup paperwork None required (unless operating under a different name) Articles of Organization filed with your state
State filing fee $0 $35–$500 depending on state (national average is roughly $130)
Ongoing state fees Typically none Many states require an annual report; fees range from $0 to $800+ (California’s franchise tax is the notable outlier)
Separate business bank account Optional Strongly recommended to preserve liability protection
EIN required Only if hiring employees Recommended even for single-member LLCs, to avoid using your SSN

A sole proprietorship is still the cheaper entry point in dollar terms. But “cheaper to start” and “cheaper overall” aren’t the same question — it depends what a lawsuit, a bad debt, or a messy tax season would actually cost you.

How Do Taxes Actually Differ?

This is the part I got wrong for months, assuming an LLC meant a whole new tax regime. It doesn’t, automatically. By default, both a sole proprietorship and a single-member LLC are taxed identically: profits and losses pass through to your personal tax return, and you pay self-employment tax (15.3%, covering Social Security and Medicare) on your net earnings.

The actual tax advantage of an LLC isn’t automatic — it’s optional. A single-member LLC can elect to be taxed as an S-corporation once profits reach a meaningful level, which can reduce self-employment tax by letting you pay yourself a “reasonable salary” and take remaining profit as a distribution not subject to that 15.3%.

That election involves added complexity — payroll processing, additional filings — so it’s rarely worth it for a business bringing in a few thousand dollars a year. It becomes worth asking about once net profit is consistently well into five figures.

Does an LLC Actually Make You Look More Credible?

Here’s a question I didn’t expect to matter as much as it did: does “LLC” after your business name change how people treat you? Anecdotally, yes. Some clients, vendors, and lenders treat an LLC as a signal of seriousness — rightly or not — the way a business bank account or a proper invoice template does. It’s not a guarantee of better contracts, but it removes a small, avoidable hesitation from a prospective client’s mind.

It also matters for banking and financing. Business lenders and some payment processors are more comfortable extending credit to a registered entity with its own EIN and bank account than to an individual operating under their own name.

Do You Still Have to Report “Beneficial Ownership” in 2026?

If you researched this a year or two ago, you may still be carrying around outdated fear about the Corporate Transparency Act’s beneficial ownership information (BOI) reporting rule — the one that threatened steep penalties for LLC owners who didn’t file. Here’s the current state of play: in March 2025, FinCEN issued an interim final rule that removed the BOI reporting requirement for domestic U.S. companies and U.S. persons entirely. As of today, that requirement applies only to foreign entities registered to do business in the U.S. — not to a typical American-owned single-member LLC.

That said, the underlying law hasn’t been repealed, courts have upheld its constitutionality, and FinCEN’s final rule is still pending in 2026, meaning the rule could tighten again with limited notice. A small number of states have also introduced their own versions; New York’s LLC Transparency Act took effect January 1, 2026, but after a late amendment, it applies only to foreign LLCs doing business in New York, not typical in-state LLCs. The short version for most small business owners forming a domestic LLC in their home state: this isn’t currently a filing you need to worry about, but it’s worth a five-minute check-in with a professional if your situation involves foreign ownership or multiple states.

So, Which One Should You Actually Choose?

There isn’t a universally correct answer, but there is a useful set of questions. How much personal risk does your work actually carry — a freelance copywriter has a different exposure profile than someone renovating properties or handling clients’ money. How much profit are you actually generating, since that determines whether the tax flexibility of an LLC is relevant yet. And how much administrative overhead are you willing to take on, since an LLC does require you to actually treat it like a separate entity — separate bank account, its own paperwork, its own discipline.

If you’re testing an idea with minimal financial exposure and low risk of being sued, operating as a sole proprietor while you validate the business is a completely reasonable starting point- you can always convert to an LLC later, and most people do exactly that. If you’re already generating consistent revenue, working with clients under contracts, or doing anything with meaningful liability exposure, the cost of forming an LLC is generally small next to what it protects.

I eventually filed mine on a Wednesday afternoon, paid my state’s filing fee, and felt almost anticlimactic about how undramatic the process actually was compared to the spiral that preceded it. If you’re standing where I was, at least you can skip the 11 p.m. panic-Googling, you already know what the seventeen tabs would have told you.



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