Rechargeable batteries are available in size 675. These batteries don’t need air to work and can be recharged multiple times but not all rechargeable batteries work with cochlear implants. Many have proprietary rechargeable batteries or ones that are builtin with a built in charger. Certain rechargeable batteries don’t work with devices that use their own charger. Current rechargeable 675 batteries will last approximately 6-8 hours per charge, again depending on your processor and battery pack.

Zinc-air batteries pack a lot of power in a small size and are relatively inexpensive to produce. These hearing implant batteries are the most energy dense chemistry of any batteries. This makes them a good choice for general use when you want a single set of batteries to last along time. However, they need to be in constant contact with oxygen to provide power.. When the zinc in the battery has completely oxidized it will stopproducing power and the battery will need to be replaced. Depending on which audio processor and battery pack you use, a set of zinc-air batteries will last for approximately 60-90 hours.

Zinc-Air Batteries	Rechargeable Batteries
PROs:	PROs:
-Most energy dense chemistry of any batteries. –   Zinc-air batteries are disposable; they are simply replaced when they wear out	–  Rechargeable batteries can be recharged and reused if you have the accompanying charger.
– Flat discharge voltage, safety and environmental benefits, good shelf life, and low cost – H​ave high volumetric energy density compared to most primary batteries	– Wearers don’t need to remember to purchase new ones or to remember where they put replacement batteries when they are needed
CONs​:	CONs:
– Propensity to dry out once exposed to outside air, limited output, and short active life.	–   Not all rechargeable work with cochlear implants –   Rechargeable batteries do not necessarily save cost in long-term costs. The batteries and accessories can be more expensive compared to disposable batteries –   They have to charged every night and in some cases every 8-10 hours which can be inconvenient