The heat of the dryer might not be good for your aids. Depending on the OEM for a Li-ion-powered device, you’ll usually finding the manufacturer say that the battery will retain its lifetime capacity best at temperatures below 95 deg F to 105 deg F or so, depending on the product.
I got a dryer that normally offers heat, dessicant, and UV-treatment but I had the OEM actually custom-deactivate the heating for my rechargeable Quattros (I since decided to punt that whole bit).
HA’s are considered relatively “disposable” but folks are a lot more concerned about getting maximum life span out of batteries in EVs, where the battery may be 1/3 the cost of the entire car, e.g., $20K for the battery alone. So, there’s tons of literature on what kills EV battery lifespan. Here’s a blog review that I thought was very good - it says that high-temperature and fast-charging are the greatest enemies of Li nickel-manganese-cobalt batteries in EVs. Total miles driven or the physical age of the battery have much less effect (other reviews say average depth-of-discharge is an important parameter, too). The same sort of physics applies to smartphone batteries and rechargeable HA batteries, too. New Data Shows Heat & Fast-Charging Responsible For More Battery Degradation Than Age Or Mileage - CleanTechnica