Xiaomi - Is a 4000mAh battery just a number to you? What if we told you 4000mAh means a day and a half without worrying about running out of juice. #RedmiNote7 #48MPforEveryone
Xiaomi's new fast-charging technology can charge a 4000mAh battery in 8 minutes - SiliconANGLE
30C/50C, 7.4V (2S), 4000 mAh LiPo Battery (BLP-744000) – Bioenno Power
Westrock 4000mah Battery For Symphony Atom Cell Phone - Mobile Phone Batteries - AliExpress
FDK HR-4/3AU 4000mAh 4/3 A Ni-MH - Battery Store
Amazon.com: TAYUZH [4000mAh] Battery for iPhone 12 and iPhone 12 Pro 6.1 Inch Ultra High Capacity Replacement Battery for iPhone 12 A2172 A2402 A2403 A2404 with Professional Repair Tool Kit and Instruction :