When you need reliable, long lasting power for your hearing aid, use these best hearing aid batteries. AG13 zinc air hearing aid batteries are simple enough for anyone to use. Easy to open package, easy to remove the batteries & easy to insert the battery into your hearing device. These cheap hearing aid batteries makes it fast to replace your batteries wherever and whenever you choose. Simple design of these zinc air hearing aid batteries dispenser takes all the hassle and frustration out of handling such small batteries. Durable housing offers high stability and safe protection against corrosion. Magnet holds battery securely. Works with only POWERTONE F138, F138T, F139 hearing aid styles. Compact and discreet packaging completely protects your batteries until you need them. You'll love it!
Other Thoughts:For the price, the quality is great, I would have expected more rubberized components to keep the elements from damaging this over time. However, for functionality, this item is very good and more than accomplishes the task.