You can find the highest quality behind-the-ear and in-the-ear hearing aid batteries at Duyar Hearing centers. Hearing aids use 1.45V batteries. Battery sizes and sizes are available in the market: 10, 13, 312, and 675. Be sure to memorize the battery size you use in your hearing aid. Battery life varies depending on the quality of the battery and the battery consumption of the hearing aid. Generally; – The average usage time of size 13 batteries is 2 weeks. Battery Maintenance Don't forget to turn off your device when not in use. When not in use, remove the batteries and leave the cover open to ventilate the interior. Warning: After removing the protective tape from the battery, leave it on for 2 minutes and then insert it into the device. This will extend the battery life. Rechargeable 675 batteries are also available. – Please keep your hearing aid batteries away from children. – Do not throw batteries into fire, they may explode. – Do not attempt to charge non-rechargeable batteries, they may explode. – Remove the battery when the device is not in use. Please do not throw used batteries in the trash. Return them to the center where you purchased the batteries. Inserting and removing batteries – Pay attention to the markings when inserting the battery into the device. Never force the battery cover or close it by force. a) Prepare the battery by removing the protective paper (tape) from the battery. Leave the battery exposed for 1 minute to allow it to work. b) Insert the battery into your hearing system. Hold your device in your hand. Open the battery cover and insert the battery. Pay attention to the + (plus) position. c) Turning on the device: Once the battery cover is closed, your device will start working. Battery Replacement • It will give a signal before the battery runs out. • When the battery voltage reaches the end of its life, you will receive a warning signal. It will give a 3-beep warning every 10 minutes. • If the battery is not changed, the device will give six double beeps at the 0.95V limit and turn off the sound output of the device. • Do not forget to always have spare batteries with you.