LONG LASTING: Contains 2pcs 312 button batteries with 155mAh capacity, ready to power up your hearing amplifier device. Battery Capacity: 2 x 155mAh. Feature: 1. Product Use: can be applied to a variety of hearing amplifier using 312 batteries, for non-Bluetooth hearing aids, they typically last 7-10 hours; for Bluetooth hearing aids they typically last 3-6 hours.
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