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Battery lasts about a year with very heavy usage.
Sorry, there was a problem. Please try again later.Hello! Thank you for your inquiry. Replacement battery #LBZ378D has a mAh rating of 4400. You may compare the mAh rating of the replacement battery, to the mAh rating of your original battery to know if you are purchasing a battery that has more, the same, or lease runtime than your original battery. Regarding your product return inquiry, please contact BestBuy directly. If you have any further questions, please let us know! Thank you
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