The Eva battery is a size 312 battery which is available for purchase at most drugstores. We recommend you purchase the high energy Battery Pack from our online store to ensure longevity of up to 12 days depending on daily use.Turning the device OFF when not in use is important to prolong battery life. A 2-month supply of batteries is included with your Eva device purchase.

Eva

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iHEARMAX

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iHEARHD

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