Get PCB & PCB Assembly Coupons: https://jlcpcb.com/coupon-center Economic CNC Machining Service : https://jlcpcb.com/3d-printing?from=3DP Try the world's most trusted PCB design software, Altium Designer with 365, for free and 25% off your purchase: https://www.altium.com/yt/greatscott! Check out Altium 365: https://www.altium.com/altium-365 Check out OctoPart: https://octopart.com/ Previous video: https://www.youtube.com/watch?v=3gmxv7AgOMw Project files: https://www.patreon.com/posts/86483763 Facebook: https://www.facebook.com/greatscottlab Twitter: https://twitter.com/GreatScottLab Instagram: https://www.instagram.com/great.scott.lab/ TikTok: https://www.tiktok.com/@greatscottlab Discord: https://discord.gg/zuAvkAuhsY Support me for more videos: https://www.patreon.com/GreatScott?ty=h Website which were shown during the video: https://www.monolithicpower.com/en/products/battery-management/chargers/1-series-cell-chargers/mp2639b.html https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP2639B/ https://www.monolithicpower.com/en/ev2639b-r-00a.html https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/EV2639B-R-00A/document_id/4851/ In this video we will be having a closer look at super fast charging that your phone can do. In this mode your phones battery gets charged up with 5A of current that makes it possible to fully charge it up in one hour. Normally your phone charges with 1A and that got me thinking how much your battery suffers during such super fast charging. So I spent way too much time making a testing circuit and then super fast charging batteries 100 times to find out whether there really is a difference noticeable ;-) Let's get started! Thanks to JLCPCB for sponsoring this video. Visit https://jlcpcb.com/ to get professional PCBs for low prices. Thanks to Altium for sponsoring this video. 0:00 Fast Charging is BAD? 1:16 Intro 1:40 My Testing System! 3:04 Discharge Circuit 4:27 Charge Circuit (5A 4.35V?) 6:05 Designing the PCB 7:33 Testing the First PCB 8:42 Full Experiment (5 Batteries/100 cycles) 10:38 Results