Short answer: The base iPhone 16 stores far less energy than the Galaxy S25 Ultra, Pixel 9 Pro XL and OnePlus 13, yet it remains competitive in controlled browsing because its smaller display, A18 chip and tightly integrated iOS hardware use the available battery efficiently. In Tom’s Guide’s cellular web test, the OnePlus 13 lasted longest at 19 hours 45 minutes, followed by the Galaxy S25 Ultra at 17:14, Pixel 9 Pro XL at 12:54 and iPhone 16 at 12:43.
That ranking measures endurance in one workload, not universal efficiency or instantaneous energy draw. The comparison also mixes a compact 6.1-inch-class iPhone with much larger Android phones, so it answers a capacity-efficiency question rather than a perfectly matched size or price comparison.
Quick comparison
| Phone | Published battery figure | Charging specification | Tom’s Guide cellular web test | Best fit |
|---|---|---|---|---|
| Apple iPhone 16 | 3,561 mAh EU-rated capacity | See Apple’s regional specifications for charging details | 12:43 | Compact iOS phone with strong endurance for its size |
| Samsung Galaxy S25 Ultra | 5,000 mAh | 45W wired; Samsung cites up to 65% in about 30 minutes with a 45W adapter | 17:14 | Large premium Android with balanced endurance and features |
| OnePlus 13 | 6,000 mAh typical; 22.92 Wh typical (22.31 Wh rated) | 80W on the U.S. page; up to 100W with the OnePlus SUPERVOOC 100W Dual Ports Power Adapter; 50W wireless | 19:45 | Longest runtime and fastest charging in this group |
| Google Pixel 9 Pro XL | 5,060 mAh typical; 4,942 mAh minimum | Up to 70% in about 30 minutes with Google’s 45W charger | 12:54 | Google software and camera features in a large phone |
Battery figures come from the manufacturers’ published specifications: Apple, Samsung, OnePlus and Google. Runtime figures are from Tom’s Guide’s comparison and reviews: cross-platform test, Galaxy S25 Ultra review and OnePlus 13 review.
Energy draw is not the same as battery capacity
mAh measures electrical charge stored by a battery at a stated voltage. It does not tell you how quickly the phone consumes that charge. Watt-hours (Wh) describe stored energy and are more useful when battery voltages differ. Power draw, measured in watts, is the instantaneous rate of consumption. Gaming, high-brightness HDR, 5G uploading, navigation and camera recording can all raise it.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →#1 Best Overall
- Precision Fit for iPhone 16 6.1-Inch: this upgraded charging case is custom designed exclusively for iPhone 16 6.1-inch , with precise cutouts and a snug, slip-free fit that stays firmly in place. It fully supports CarPlay and sync-data functionality, so you can connect to your car, transfer files, and use all your phone features normally without removing the case.
- Large Capacity：Features a premium 5000mAh rechargeable core, delivering an extra 100% usage time for iPhone 16 and banishing low-battery worries. Stable, mild power protects your phone’s native battery health, extends its life, and keeps your device fully charged all day.
- USB-C Input/Output Dual-Device Charging: enjoy fast and stable USB-C input/output, It supports simultaneous charging for two devices, making on-the-go power supply super convenient. This case supports wired input charging,no wireless charging function.
- Design Protection: combines charging and reliable protection in one slim body. The anti-slip exterior strengthens grip and prevents accidental drops, while the reinforced bumper cushions bumps, shocks and scratches, guarding your phone against daily damage, combining full protection with easy daily use.
- Portable Design Power Wherever You Go: measuring just 6.3 x 3.22 x 0.87 inches, this lightweight battery case slips easily into pockets or small bags—making it the ideal travel companion. Whether you’re commuting, hiking, or simply out for the day, enjoy all-day power without the weight or clutter of external power banks.
Runtime is the result of stored energy divided by the phone’s average demand during a particular test. A 6,000-mAh phone can last longer simply because it stores more energy, even if it draws more watts during some tasks. OnePlus is unusual here because it publishes both 22.92 Wh typical and 22.31 Wh rated energy for the OnePlus 13. The other capacity figures should not be treated as directly comparable Wh measurements without their rated voltage.
How much smaller is the iPhone 16 battery?
Using the published figures, the iPhone 16’s 3,561 mAh capacity is approximately 29% below the Galaxy S25 Ultra’s 5,000 mAh, 30% below the Pixel 9 Pro XL’s 5,060 mAh typical capacity and 41% below the OnePlus 13’s 6,000 mAh typical capacity. Those percentages describe storage capacity only; they do not mean the iPhone consumes 29% or 41% less energy.
Apple’s EU specification page also provides a standardized endurance label of 37 hours per cycle. That regulatory figure is useful context, but it is not interchangeable with Tom’s Guide’s continuous cellular-browsing result.
Rank #2
- EXTENDED BATTERY LIFE: Up to +50% Extra Power: Charge on-the-go with the built-in 2,800mAh battery – more music, more movies, more memories
- SLIM & PROTECTIVE DESIGN: Lightweight Protection: Slim profile offers enhanced 6-foot drop protection while slipping easily into your pocket, keeping your iPhone 16 safe without the bulk
- MAGNETIC COMPATIBILITY: Integrated magnet for secure attachment to wallets, vent mounts, and stands – designed to hold your iPhone 16 in place for easy access, without magnetic charging functionality
- PRIORITY PLUS CHARGING: Charges your iPhone 16 first, then the Juice Pack itself, ensuring your phone has power when you need it most
- SUSTAINABLE & CONVENIENT: Eco-Friendly and Versatile: Made with up to 50% post-consumer recycled plastics and equipped with a USB-C port for universal charging convenience
What the iPhone 16 test result means
Tom’s Guide ran continuous web surfing over cellular at 150 nits, using default display settings for the main comparison and timing until the battery reached zero. The base iPhone 16 lasted 12 hours 43 minutes. That supports an all-day expectation for ordinary mixed use, but “all day” is not a standardized promise: weak signal, outdoor brightness, gaming, navigation, camera use and background activity can reduce it substantially.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →The result reflects more than the A18 processor. The iPhone 16 has a smaller display than the Android Ultra models, and Apple controls the chip, operating system, display behavior, modem integration and power management. Those design choices can reduce demand in this workload, but Apple does not publish a complete consumer table of average watts for everyday tasks; calling the phone universally more efficient would go beyond the available measurements. Apple’s battery-life testing notes are at Apple Support.
Base iPhone 16, Pro or Pro Max?
The base iPhone 16 is the literal subject of this comparison. The larger Pro models change the answer:
Rank #3
- 【Advanced Synchronization Technology】 Amazing sync-through technology that you can charge your battery case and iPhone 16 simultaneously with your existing iPhone charging cable,conveniently sync your iPhone 16 to your MacBook, PC or laptop without having to take the battery case off.
- 【CRUCIAL NOTICE】Only compatible with iPhone 16 (6.1 inch), not compatible with other models, the charging cable is included in the package, supports the built-in earphone and wireless charging function of the mobile phone.
- 【ULTIMATE PROTECTION】 The battery case is not only a portable charger, but also a protector for your iphone.Raised sides and hard-shell design maximizes protection to your iPhone 16, durable high- class material to protect your iPhone from scratches, drops, impacts and other daily wear and tear.
- 【EXTENDED BATTERY DURATION】 10000mAh capacity rechargeable built-in lithium polymer battery case provides extra 200%+ power which is equivalent to an additional 8+ hours talk time or 12+ hours web-browsing time. 4 LED lights indicate how much power you have (25%--50%--75%--100%). Power switch allows you to switch on/off the battery case.
- 【100% SATISFACTION GUARANTEED】Thank you for choosing [YINGYKJ]! We are committed to providing you with the highest quality products and an exceptional shopping experience. Your satisfaction is our top priority, which is why we offer comprehensive after-sales support to ensure you are completely happy with your purchase.
| Model | Published capacity | Tom’s Guide result |
|---|---|---|
| iPhone 16 | 3,561 mAh | 12:43 |
| iPhone 16 Pro | 3,582 mAh | 14:07 |
| iPhone 16 Pro Max | 4,685 mAh | 17:35 |
The iPhone 16 Pro Max is the fairer physical-size and premium-price rival to the Galaxy S25 Ultra and OnePlus 13. Comparing those large phones with the compact base iPhone 16 is useful for showing how much endurance Apple obtains from a smaller battery, but it is not a like-for-like screen-size comparison.
Galaxy S25 Ultra: strong endurance without the biggest battery
The Galaxy S25 Ultra combines a 5,000-mAh battery with a 17-hour-14-minute result in Tom’s Guide’s cellular web test. It therefore outlasted the base iPhone 16 by 4 hours 31 minutes under that methodology. Samsung specifies 45W wired charging and up to 65% in about 30 minutes with a suitable 45W adapter.
Recommended Free Tools
The S25 Ultra’s larger, high-resolution display, adaptive refresh behavior, modem conditions and premium Snapdragon platform all affect consumption. Its longer runtime demonstrates greater endurance in the test, not a measured advantage in watts per task or per watt-hour. It is the sensible large-phone compromise for buyers who want Samsung software, an S Pen and a broad camera and productivity feature set without choosing the fastest-charging device.
Rank #4
![Alpatronix Battery Case for iPhone 16/16e/17e [2025 New], 15W Fast Wireless Charging Case, Portable Strong Slim Protective Rechargeable Charger Case, Compatible with iPhone 16/16e Black](https://m.media-amazon.com/images/I/41elH2d-4HL._SL160_.jpg)
- [Never out of power]: Our charging battery case elevates your iPhone 16/16e experience by having power anywhere you go! With our battery charger case, you no longer need a power bank, as power is always in your hands and on your iPhone.
- [Convenient design]: Enjoy hassle-free charging for the battery case and your phone together without removing the case. Our battery case is designed to charge your iPhone first before charging the battery case. Remove the case and charge separately to recharge the case faster.
- [Ultimate protection]: Our durable charging case is equipped with raised bezels, which ensures full protection for your iPhone 16/16e/17e, including a robust tempered glass shield that withstands drops, impacts, and daily wear.
- [Wireless case charging]: Our battery case is capable of being wirelessly charged. Cable charging is also available to charge the case and your iPhone 16/16e/17e at the same time. Your iPhone is charged with a port inside the battery case.
- [What you get]: The Alpatronix iPhone 16/16e/17e battery charging case is designed in California and includes a 1-year warranty and exceptional customer service. The product package includes: Battery Case, Tempered Glass Screen Protector, USB-C Charging Cable, User Manual.
OnePlus 13: endurance and charging leader in this comparison
The OnePlus 13 posted 19 hours 45 minutes, the longest result among the compared phones. Its 6,000-mAh typical battery and published 22.92 Wh typical energy give it a substantial reserve, while the LTPO display can vary from 1 to 120Hz.
Charging claims require careful reading. The U.S. specification page lists 80W SUPERVOOC, up to 100W with the specified OnePlus SUPERVOOC 100W Dual Ports Power Adapter, and 50W wireless charging. The headline 100W rate is therefore adapter-dependent, and a generic USB-C charger may not reproduce it. OnePlus also notes that actual performance varies with software, environment, usage and product differences.
For buyers who value both long sessions and short top-ups, this is the strongest option in the cited testing. Its advantage comes from the combination of a large energy store and the phone’s power-management system; the runtime result alone cannot prove lower per-task power draw than an iPhone.
Best Value
- 【Compatibility Note】:Our battery charging case for iPhone 16/16e is slim and light only 6.1inch thick & 3.3oz weight. Endurable true 8500mAh 15W Fast battery double for iphone 16 power. Enjoy more talk time, music, movies, and internet surfing. The battery case for gift,travel and work.【NOTE】: ▶▶NOT WORKS for iPhone 16 Pro Max/16 Plus /16 Pro .NOT support Wireless Charging.
- 【120% Extra & Powerful 8500mAh Capacity】:Our battery charging case is real powerful 8500mAh capacity provides up to 120% extra battery life for iPhone 16/16e. This high-capacity battery gives you up to 32 extra hours of talk time, 110 hours of music playback or 19 hours of video playback.Our battery cases are made by developmental design USB-Typec connector and original receptacle, lifetime 10000+
- 【Stronger & 360°protection】:Protection and charging are integrated. Made of high quality materials,the battery case for iPhone 16/16e is not only a portable backup charging case, but also a 360° protection for your phone from scratches in daily life. The top soft rubberized raised edge fully protects your Phone from scratches and daily wear and tear.
- 【Easy to Install】The charger case features a user-friendly design that allows you to charge your Phone 16/16e on the go effortlessly.Easy to use:★Bend the top TPU soft adhesive slightly back, and then insert the phone vertically into the back clip battery from the top. and press Phone Battery Case the power button 3 seconds, start & close charging for iPhone. The LED indicator lets you know the charging status (0%-25%-50%-75%-100%).
- 【What's in It】: Charging case for iPhone 16/16e x 1, tempered glass screen protector x 1, user manual x 1. Charger cable x 1. We promise 12 months lifetime customer service to ensure you enjoy your purchase for a long time.
Pixel 9 Pro XL: capacity is not a guarantee of runtime
Google lists a 5,060-mAh typical battery (4,942 mAh minimum), 24-plus-hour battery claims and up to 70% charging in about 30 minutes with Google’s 45W charger. In the cited cellular test, however, it reached 12:54—only 11 minutes longer than the iPhone 16 despite having roughly 42% more listed capacity.
This near tie does not show identical power consumption. The phones differ in display size and resolution, refresh behavior, modem and thermal characteristics, software and test implementation. It does show why capacity alone cannot predict endurance. Pixel’s battery-saver modes and Google ecosystem may still make it the right choice for some users, but the cited test does not support buying it solely for battery life.
How fair is the ranking?
Tom’s Guide’s 150-nit cellular-browsing procedure is a useful controlled comparison, not a wall-power measurement. Results can change with:
- Weak 5G or LTE signal, which makes the modem work harder than strong Wi-Fi.
- Outdoor brightness, where large high-luminance displays can consume substantially more power than at 150 nits.
- Adaptive 120Hz versus fixed 60Hz settings; Tom’s Guide found meaningful changes when refresh behavior was altered.
- Gaming, sustained GPU loads and thermal limits.
- 4K or HDR recording, stabilization, computational photography and video encoding.
- Software versions, battery health, ambient temperature and background synchronization.
Accordingly, the ranking applies to the stated cellular web workload. It should not be generalized to standby, Wi-Fi streaming, gaming or continuous video recording.
Which phone should you buy?
Choose the iPhone 16 for compact efficiency
- You want a smaller flagship and Apple’s ecosystem.
- You value strong test endurance relative to battery capacity.
- Your use is mixed rather than dominated by gaming, hotspot use or long camera sessions.
- You can accept slower charging than the OnePlus 13 and do not need a 120Hz adaptive display.
Choose the Galaxy S25 Ultra for a balanced large Android flagship
- You want the S Pen, Samsung software and a premium camera system.
- You prefer stronger tested endurance than the base iPhone 16.
- You accept 45W charging and a large handset.
Choose the OnePlus 13 for maximum runtime and rapid charging
- Battery longevity and quick recovery are your top priorities.
- You are comfortable with the SUPERVOOC charger ecosystem.
- You want 50W wireless charging and the largest battery here.
- You understand that maximum 100W wired charging requires the specified adapter.
Choose the Pixel 9 Pro XL for Google’s platform
- You prioritize Pixel software, camera processing and Google services.
- You want a large screen and battery-saver features.
- You accept that its larger battery did not produce a commanding lead in the cited independent test.
Bottom line
The iPhone 16 does not use a large battery; it uses a small one effectively in the cited browsing test. The OnePlus 13 is the endurance and charging winner among these phones, the Galaxy S25 Ultra is the strongest mainstream large-phone compromise, and the Pixel 9 Pro XL demonstrates that extra capacity alone cannot guarantee longer runtime. Choose by workload, size, charging habits and ecosystem—not by mAh printed on the specification sheet.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
