Battery-sonicare-elite, hqrp 3.7v li-ion battery works with philips sonicare hx6150 hx6902 hx6910 hx6911 hx6912 hx6932 hx6933 hx6952 hx6982 hx6311, flexcare platinum hx9170 hx9170/10 hx9110 hx8911 toothbrush repair. Replacement battery for philips sonicare elite hx7500 toothbrush, fdk nimh, 2150 mah, sonicare elite 7300 - battery replacement: this will show you how to replace the internal battery on your sonicare elite 7300. after having my 2nd one die on me within 3 yrs i figured out how to rip it apart and fix it.. Steps to change the battery in sonicare elite. how to brush with an electric toothbrush -- mark burhenne dds with ask the dentist - duration: 2:33. mark burhenne, dds 99,774 views, the reason sonicare uses a nickel cadmium battery instead of nickel metal hydride is because nickel cadmium batteries delivery very high current which is necessary to drive the coil. nickel metal hydride cannot supply sufficient current. be sure to replace with nickel cadmium and perform the battery reset procedure.