Does Replacing Your iPhone Battery Really Make It Faster?

After four years of daily use, my iPhone battery health dropped to 78% and I wanted to know: does replacing an iPhone battery really make it faster? In this video I run a complete iPhone battery replacement performance test, comparing old and new batteries across fifteen different benchmarks and real-world tasks to see whether an iPhone battery replacement improves performance, speed, battery life and overall smoothness or if it is just a myth. The testing covered everything from iPhone boot-up speed comparisons, application load times, camera responsiveness after heavy use and web browsing in Chrome, to more demanding tasks like Lightroom photo exports, gaming performance in COD Mobile and F1 Clash, and full benchmark suites including Geekbench single-core, multi-core, GPU, AnTuTu and 3DMark stress tests. I also directly compared battery life between the old and new battery under identical workloads to measure real-world endurance differences. The results show exactly how much of an impact iPhone battery health has on performance and whether a new iPhone battery can restore lost speed, stability and efficiency. Replacing your iPhone battery does not just extend screen-on time, it can make your phone feel noticeably smoother in everyday use, improve consistency in benchmarks and gaming, and deliver measurable gains in demanding apps. This breakdown answers whether an iPhone battery replacement is worth it in 2025 and whether it is a smarter choice than upgrading to a brand-new phone. If you have been searching for an iPhone battery replacement review, an iPhone battery performance test, old vs new iPhone battery comparisons, or want to know if iPhone battery health really affects speed, this video puts it to the test with real numbers, gameplay, benchmarks and side-by-side comparisons. Replacing the battery gave this iPhone a second wind and proved that sometimes the best upgrade is not buying a new device, but simply restoring the one you already own. Subscribe Here: https://www.youtube.com/@JSNLEONARD?sub_confirmation=1 Want to Support the Channel? https://buymeacoffee.com/jsnleonard Is the Ryzen 7 5700X3D + RX 6800 STILL WORTH IT? https://youtu.be/9hkJJrheKzw Is the Sony WH-1000XM4 STILL WORTH IT? https://www.youtube.com/watch?v=ruve7x6yxxU Is the iPhone 12 STILL WORTH IT? https://www.youtube.com/watch?v=0A345Zyn9mk Ryzen 5 5600X + RX 6800 - A MATCH MADE IN HEAVEN: https://youtu.be/NFpz2cuWspw Is MIXING RAM THAT BAD? https://youtu.be/6PyEY2pBPd4 Intro Song (Song #1): Ty Simon - Whos That Song #2: Skygaze - Kissing the Moon Song #3: Skygaze - POST BLOOM Song #4: Skygaze - Faster feat Helios Amor Outro Song (Song #5): Skygaze - Easy For Inquiries: JASNLEONARD@GMAIL.COM My Socials Steam: http://steamcommunity.com/id/MrTitanFTW YouTube: https://www.youtube.com/@JSNLEONARD TikTok: https://www.tiktok.com/@JSNLeonard Twitch: https://www.twitch.tv/MrTitanFTW X: https://twitter.com/JASNLeonard Reddit: https://www.reddit.com/user/JSNLEONARD/ IG: https://www.instagram.com/jsnleonard/ Bluesky: https://bsky.app/profile/jsnleonard.bsky.social Threads: https://www.threads.com/@jasonleonard.jpg Purchases made through some store links may provide some compensation to myself, Jason Leonard. Equipment Used Camera: https://amzn.to/4ni0uj7 Lens #1: https://amzn.to/467H61q Lens #2: https://amzn.to/46uhZGj Lens #3: https://amzn.to/42bwJs1 Light: https://amzn.to/4p9j1zK Tripod: https://amzn.to/46moc82 Software & Codec Used Video Editing: Adobe Premiere Pro Photo Editing: Adobe Photoshop / Adobe Lightroom / Canva Pro Codec: S-Log3 to REC709 to H264 for YouTube PC Specifications CPU: https://amzn.to/3VwgpOS CPU Cooler: https://amzn.to/3V2j6aH GPU: https://amzn.to/4lX1LuL RAM: https://amzn.to/4nkhOnJ Case: https://amzn.to/46kWQ2a PSU: https://amzn.to/4n9LuUi Motherboard: https://amzn.to/3V1WQOk SSD #1: https://amzn.to/3Vzo2nD SSD #2: https://amzn.to/41E8dzL OS: https://amzn.to/46bgw7D Intake Case Fans: https://amzn.to/4nhVbjM Exhaust Case Fans: https://amzn.to/3Vx3vQD Peripherals Mouse #1: https://www.aliexpress.com/item/1005005648683137.html Mouse #2: https://amzn.to/3JPl4Ja Mouse #3: https://amzn.to/4p4yTUp Mouse Pad: https://amzn.to/467NLse Keyboard: https://wooting.io/wooting-60he Headphones: https://amzn.to/4pdYlH2 Microphone: https://amzn.to/4lX23BR Audio Interface: https://amzn.to/3K7tXhd Monitor #1: https://amzn.to/480TbI0 Monitor #2: https://amzn.to/480TbI0 Chapters 0:00 - Intro 0:32 - Test Setup & Methods 1:02 - Booting Up the iPhone 1:33 - Application Load Test 2:08 - Camera Responsiveness 2:39 - Web Browsing Using Chrome 3:10 - Exporting 30 High Resolution Photos Using Lightroom Mobile 3:45 - F1 Clash 4:23 - COD Mobile 4:57 - Geekbench 6 Single Core CPU 5:24 - Geekbench 6 Multi Core CPU 5:39 - Geekbench 6 GPU 5:52 - AnTuTu 6:09 - 3DMark 1st Test 6:37 - 3DMark 2nd Test 7:02 - Battery Life Comparison 7:35 - What Did We Actually Learn? 8:43 - Was it Worth It? 9:00 - Outro