Ease of use: Hearing aids are tiny things even steady hands can have trouble with. The more likely you are to remove and replace your hearing aids throughout the day, the more important ease of use will be. Battery technology: Most hearing aids today use lithium-ion batteries that recharge by dropping them into a case (which itself carries extra charges). Most hearing aids these days opt for rechargeable, so this is something of a dying breed. Cost: Even “cheap” hearing aids can be expensive, and most insurance plans don’t cover them.