New 72Wh 11.1V Battery T05W1 for Dell Precision 7710 P29E P29E001 M28DH, MFKVP
91Wh 11.4V MFKVP. Always use an original adapter, low quality adapter will kill the battery quickly. DrLappy, based in Hong Kong, has been in the laptop parts sourcing field for 12 years. More buying options.