If you’re stuck somewhere, sometime, without access to a store which may have the correct size button, versus something you probably have immediate access to.
My hearing aid batteries last about three days. I wish I had another use for #10 batteries. My hearing aid is designed to shut off as soon as the battery’s charge curve begins to drop, so I throw out batteries that still have some charge remaining.
Jeebus, really? That’s gotta add up fast.
Me: My condolences.
Kayaker: Wut?
Me: I said, MY CONDOLENCES!!!
My late Mother’s hearing aids also used #10 batteries. As I said upthread, the place where she bought her aids supplied her with batteries for no charge. Even so, you can buy #10 batteries on Amazon for as cheap as 23 cents apiece. At a price of a quarter each, one would spend 50 cents every 3 days, or about 61 bucks a year.
Regarding the disassembly/reassembly issue. One trick I developed is when I find that what I’m working on is getting complicated in disassembly is to stop early, reassemble it, and then start over. Maybe do this at several points for something really nasty. Helps me learn how it all fits together.
The problem nowadays is screens. Mucking about with removing those is a nightmare.
Beltone is famous for providing free batteries for the first couple of years with new aids. Then the freebies run out.
My prior set of Beltone aids used #23s. The difference in battery life between the cheapest and most expensive #23s I could find was about 4x: ~2 days to ~8 days. It turned out the more expensive ones had the lowest cost per day and the least frequency of having to change them. Which also meant less need to have a pack of spares always to hand. Beltone brand were not cheap, but again were most cost effective once I’d run through their free-batteries promo period.
Punchline being it behooves anyone buying HA batteries to actually pay attention to quality / useful life, not just price, when picking out what to buy.
Sadly I lost those aids in Feb. My new ones ($$!! → &%^&^@##@*^&$*&%$) have built in non-replaceable rechargeable batteries. The aids sit in a little wireless charging cradle overnight and last about 3 days on a charge. I’d actually have preferred replaceable batteries, but that seems to be not the direction the industry is going.
FWIW, in the ~4-1/2 years since my first set were new the progress in HA tech is nothing short of astounding. And the old ones were pretty amazing when they came out.
I do not remember the brand of HA that Mom purchased. I do know that they were the cheapest model available (and became less effective as she aged), but she had them for at least 10 years, and the batteries were free all the while.
Now, this may have been a policy of the store, rather than the brand.
My good friend just got new aids, and they are also rechargeable. He loves them!
For someone who does not travel much or at all, the rechargeable type are a super convenient no-brainer.
For someone who does travel a lot and doesn’t want to lug a very expensive easy-to-lose charger rig around, they’re … less wonderful. Unlike the replaceable batteries, once they’re dead a full recharge takes a couple hours. Once you get to wherever you keep the charger. As opposed to 30 seconds of fumbling with little parts and you’re back in business.
There’s always a downside to any new tech. Always.
“Repeat until the button no longer gets noticeably hot” will only work if the button battery is also 9 volts, or if you’re completely draining the 9-volt battery. I don’t think very many button batteries are that high voltage, though, which means you’re certainly wasting a big battery, and likely damaging the small battery by overcharging.
My #10 batteries last 3-5 days depending. But they are really cheap. I keep some in my car, my dopkit, both bathrooms and in the little case that I keep my hearing aids in.
That’s my hack. Just have 'em when you need 'em. I get them for 25 cents apiece. Doesn’t break the bank.
If you’re buying them from a drug store or something, that’s the problem. Go online.
Or Costco. Mine average out to be less than 20 cents each. A battery lasts me at least 4 or 5 days.
I have mixed feelings about the rechargeable ones. It’s easy to throw a tiny spare pack of batteries in my purse (my aids give at least a couple. Hours warning of the batteries running out). Hauling along a recharging case whenever I’m not at home is less appealing. I suspect by the time I need to replace mine, the industry will have decided that for me.
Indeed, there is a definite law of diminishing returns with my recharge method.
You’ll only get a fraction of recharge life…but, in a pinch, you’ll get a few extra hours of functionality…until the store opens the next day. 
Slightly embarassing one here.
We have plugs for our kitchen sinks that are also a strainer (you push them down to create a seal when you want them to act as a plug). They get fairly grotty.
After a few years of having to use a toothbrush with bi-carb and vinegar every couple of months to clean them, the ‘Doh!’ light went on. Dishwasher!!
Now we chuck them in the dishwasher every time, and rarely need to deep-clean .
If you’re careful about how you handle them, you’ll probably find the rubber gasket part can be peeled off the metal part so the dishwasher will clean underneath where the two parts fit tightly together.
In a similar vein:
On a standard sink installation with a disposer, the flexible rubber guard with flexible rubber tabs or fingers that keeps human hands & dropped objects out of the disposer is also removable. It just lifts straight up with a little wiggling.
If you’ve never cleaned the underside of that thing you’re in for a gross “treat” the first time you turn it over. A lot of disposer stink comes from there too. Which so-called “disposer cleaners” (wildly expensive ordinary bleach) don’t reach.
Just pop that thing out and run it through your dishwasher too. Replacements are cheap at home depot if it gets too grotty or torn.
A simple way you can de-odorize your stinky drain is to take a rinsed-out plastic gallon milk jug, squirt in some liquid dish detergent (like Dawn or similar), and a couple chug-a-lugs of bleach.
Shake up the jug until full of bleachy foam, and pour the foam down the drain.
Unlike liquid bleach, the foam will fill every nook and cranny of your sink drain.
Drifting off to sleep:
She: Zzzzzz.
Me: Mmmph.
She: ZZZZZZ…
Me. Whap!!!
(Repeat, all night long.)
Don’t worry, she’s a mosquito and the only one I’m hitting is myself, all night long. It’s comical if you think about it.
Now that temperatures are rising around here, it’s becoming an issue. And this year, I’m taking measures. For the last few weeks, I’ve inspected the bedroom walls and ceiling before tucking in for the night. Most evenings, I’ll find and squash one of those little needle-nosed fuckers and actually get a good night’s sleep.
I keep a gallon-sized ziplock bag in the freezer for vegetable scraps. Onion peels, celery ends and leaves, carrot tips (not stems though, those are bitter) just about anything I am peeling or processing, the bits go into that bag. I also keep bags of chicken bones whenever we bake a whole chicken. Then every few months when I have a few saved up I dump the whole thing into “The Vat” and make the most nourishing broths. They are always a little different, (the best ones have leek or shallot bits) but always delicious.
Old eggs make tender, delicate crepes. If you can never get them to turn out right, chances are your eggs are too good.
When following a crochet pattern on a .pdf I use the highlight function to mark my place at the end. Then I save the file with that day’s date in the title. Any notes can be placed using the “signature” function.
Highlight and signature will work even if you don’t otherwise have write access to the file.
An ADHD hack for time-blindness - I set alarms on my computer every couple of hours throughout the day. This just allows me to take a moment and orient myself to the passage of time and whether I am where I need to be in whatever task(s) I have set myself. It prevents that horror of suddenly realizing it’s 7:00pm and I have no idea what to cook for dinner.
Whenever a dog is troublesome - jumping, running, escaping, etc. - don’t scream out a bunch of words it doesn’t know. Instead, say forcefully, “Sit!”. “Sit” is the first command most dogs learn, and the most deeply hard-wired in their brains. If anything is going to get through to them, this one will.
I’m trying to remember the comedian (possibly Bill Cosby?) who talked about how male mosquitoes buzz but don’t bite, and females bite but don’t buzz. So, if you’re laying in bed and you hear buzzing, you’re OK. But if you don’t hear anything… 
My mom’s current dog (who I suspect is autistic) has a very limited range of commands he knows. Like, if he somehow gets out of the fenced-in back yard, and is zipping up and down the street, telling him “come” won’t accomplish anything… but if you open the front door and tell him “door”, then he’ll go right through it. Because we’ve consistently trained him that when we open a door for him to go through, he still has to wait for us to say “door”.
And even though “down” usually means that he needs to lie down on the floor, it oddly also works when he has something that he needs to drop.
I throw combs in the dishwasher.