I have Aleras. I get three days of battery life if I wear them 16 hours a day with the wireless features enabled by default and if I put the aids in the dryer with the batteries in the aids. I get six days of battery life if I remove the batteries from the aids before putting them in the dryer overnight, turn off the wireless features,* and don’t spend a lot of time in noisy environments or in program modes. Four to five days of battery life is typical for me with my normal use.
You’re worried about filling landfills with the batteries? I’m conscious of filling landfills, too, but in the grand scheme of things, this isn’t worth much when it comes to hearing aid batteries which are tiny. I’ve saved all my old hearing aid batteries in one plastic bag over the last 18 months to recycle back with my audiologist, and the bag easily fits in the palm of my hand and weighs less than one empty soup can. They no longer make aid batteries with mercury in most cases in the US, so the environmental damage is negligible.
Other people (mostly people who are used to other aids whose batteries lasted for weeks) worry about the cost of hearing aid batteries. If you shop carefully, with four-day battery life, you’re spending about a buck a week on hearing aid batteries or $60 a year. In the context of the cost of the aids, this is nothing.
*RE: Turning off wireless mode on the Alera: This only applies to the Alera models with wireless features, of course. You turn off the wireless features on these Aleras by holding the button down for two seconds as you close each battery door to turn the aids on–you’ll hear a repeating double-chime instead of the normal repeating single chime to indicate that you have turned the wireless features off. This is also called Airline Mode because you’re supposed to use this mode if you have your aids turned on while taking off or landing. Remember, they say turn off all electronic devices? It’s important to do this with Aleras and other aids with wireless features because they can interfere with airline navigation under 10,000 feet. Doing this all day every day also gives you a small bump in battery life, because the wireless feature burns batteries.