That’s pretty steep, probably almost $200 to replace the battery after warranty expires. Is this quote for a pair of HAs or for 1 HA?
Given that you know about this cost, why would you still want to buy the rechargeable version? Given the per regular battery cost of about $0.18 based on the Costco battery price, it amounts to $16/year battery cost for each HA assuming that it lasts for 4 days (which is a very conservative estimate). Or $66 over 4 years per HA. Compared to almost $200K battery replacement cost.