Hey, sorry for the slow reply. I have Resound Danalogic I-fit Cs91w hearing aid on the left ear which uses cell batteries- I don't think there is any way of recharging these...
But my Cochlear implant is a Cochlear nucleus 6, which has the option of a rechargable battery or disposable one like my hearing aid. The disposable one uses the same batteries as my hearing aids except it uses 2 at once, and the batteries last about 25 hours as opposed to 2 weeks on the hearing aid (thats the difference in power it uses).
These are the disposable batteries...
And for example, if I had those. 10 packets of 6 and used them for my waking hours (about 16hrs a day), one pack of 6 would last about 5 days give or take. Just for the cochlear. If it was for my hearing aid it would be 3 months with 1 packet... Now you can probably understand why the rechargable route makes sense to me.
This is the "dock" I can use the charge the rechargable batteries. Doing up to 4 at a time. These batteries fully charged last about 16hrs so a bit less, but way more eco friendly!!
^ No usb charging option, just different types of mains plugs.. Which is fine if you're not planning to travel by bike for months at a time lol.