I asked my audiologist that question and her recommendation was “just don’t wear them when you’re working in the yard.” She surmised I’d be alone much of the time not talking or actively listening to sounds or, from what I told her, wearing gun muffs to block the sound of noisy power tools. Part of my question to her is that ReSound recommends Sports Locks - add-on clips to secure the HA’s for people with “more active lifestyles(!).” She didn’t bite at my suggestion that I might need the Sports Locks for working outdoors and for the Quattro rechargeables, Sports Locks, which take some doing putting on and off the HA’s I guess, make it trickier to get the rechargeables into the charging unit.
It’s an interesting thought relatively to @HOHKate’s remark, how much time to you actually have to be listening through HA’s to keep your brain “trained?!” You can be a superb athlete and you don’t have to train 24x7. Also, when you sleep (without HA’s), your brain is listening all the time - you can awake another sleeper by making noise - but maybe one can say the speech centers are turned off then and not being “hurt” from not wearing HA’s while asleep. I don’t think an hour, two, or three a day while awake not wearing your HA’s and not trying to process speech without them is going to be the end of the world, especially if your hearing loss is relatively moderate and you’ve understood close to normal speech (if loud enough) without the HA’s.
Relative to my previous remark elsewhere on exposing HA’s to heat, particularly for the sake of the Li-ion batteries in Quattro rechargeables, I am glad to have an audiologist excuse note not to wear the HA’s if I go out for some time to work in the 105 deg F Texas summer heat. I have similarly also taken to leaving my cell phone indoors when I am working in the yard now that batteries are irreplaceable (or only replaceable with special expense). The Quattro rechargeable manual says the following:
The operating temperature range for the charger and the hearing aids is 0 °C - 40 °C/ 32 °F - 104 °F.
Most recommend not to charge Li-ion batteries below 55 deg F. My Microsoft Surface PC manual says not to use the device above 95 deg F. I try to stay between 55 deg F and 80 deg F with Li-ion powered devices and to maximize the long-term lifespan of a battery, if I store a Li-ion device I try to store it at 40% to 50% charge state, checking the charge periodically (many batteries self-drain a few % a month) at less than 80 deg. Keeping a Li-ion device at a high charge state or a low charge state is bad for the long-term lifespan of the battery.