I retired from a Costco HA center over three years ago and keep in touch with folks from different offices. The new, non-replaceable, battery models have proven to be quite reliable.

Your old aids are at least six generations old. You will be amazed at the difference the new technology makes!

"The whole problem with the world is that fools & fanatics are always so certain of themselves, and wiser people so full of doubt" Bertrand Russell