Thank you, i changed the battery mi3 easily. I dont need steep 9,10,11. I removed nfc stickers that stick to battery and attached to top cover carefully, make it top cover and antenna nfc still integrated. Mi3 Battery is removed Due problem "Bootloop mi logo without android, and you can enter fastboot only, no matter it sucessfully flashed via fastboot room it will stay bootloop". So, yes, if the battery not good, it will goes to bootloop automatically.