WARRANTY & SUPPORT: Replacement or refund supported within 1 year warranty if any battery issues. For saving your time, please contact us in time if any issues and our customer service team will offer a solution asap. REPLACE PART: 40Wh XCMRD V8VNT 4WY7C FW1MN 0MF69 24DRM 49VTP 4DMNG 6HY59 68DTP 6KP1N 6XH00 6K73M 8RT13 8TT5W 9K1VP DJ9W6 G35K4 G019Y N121Y MR90Y MK1R0 T1G4M VR7HM PVJ7J V1YJ7 YGMTN X29KD XRDW2 W6XNM 312-1390 312-1387 312-1433 312-1392 451-12107 451-12108 battery. (please check your original batterys part number/shape to make sure you get the correct replacement battery!)