Harbor Freight had some on sale a while back for $11.00
For warranty work, you send your ears to Wuhan.
I had my previous pair for 8 years. Costco was still willing to work on them but parts were no longer available.
There are advantages both ways with battery vs rechargeables. Mine are rechargeable. I got the battery pack for the charger that will charge them about 5 times before having to be plugged in again. That was well worth it. If needed, I can charge the battery pack from a car battery, solar, any other 12v source, or from a cell phone power pack.
