Recharge household batteries?

I've got a couple of double and triple A NiMH battery chargers I got them for the digital cameras when a lot of them used 4 double A batts and used them up quickly. 8 packs of AA worked best for my use case.
It's a timing thing with me. If I'm going to be using the batteries a lot, nearly every day, the rechargables are more cost effective. Triple A rechargables never impressed me all that much. They run out of juice to fast for my taste both Alkaline and NiMH.

 

I use AA and AAA rechargeables in lots of places around the house and on the road. In applications like remote controls they go a year between charges. Flashlights a bit less. In my home, there are service flashlights for everyday use and there are separate emergency ones* which I keep loaded with lithium primary cells.

My shaver runs on rechargeable AAs because I travel all the time and I don't want a lithium battery in the cargo hold of the plane for safety reasons. I carry a tiny USB-powered charger in case the trip lasts longer than the charge- but I've only used it twice in the past decade.

I strongly recommend Panasonic's "Eneloop" brand. I've tried many and theirs are consistently wonderful.

*on emergency flashlights: I absolutely love the Toshiba one I got in Japan, wish I'd gotten more. It glows in the dark and it has no power switch. It simply turns on as soon as you remove it from its wall bracket. This design feature is great, because it discourages casual usage and thus preserves battery power for an actual emergency.

 

Second the Eneloop recommendation. Don't know if Costco still even carries them, but sales were common years ago.

I used NiMH AA and AAA in remotes and closet lights. Will use them in other lights for planned activities.'Emergency' use I've just been using my phone. Got some alkalines* on hand for flashlights if needed.

NiMH(and NiCd) have a lower per cell voltage than alkaline. Some gadgets have an alkaline only label for that reason. Depending on the gadget, NiMH might be good enough, and others should stick to alkaline. I'll use NiMH in the programmable thermostats if need be, but not the blood pressure cuff.

C and D NiMH simply aren't common. Same with the chargers. I don't have enough things that use them to put in the effort to get NiMH for. Seen rechargeable Li-ion in those sizes that were self contained with built is USB charging. Wasn't cheap then to power a 6 cell flashlight though. Will take another look when it is time to replace the alkaline stock.

*don't keep alkalines in aluminum flashlights. They will off gas over time, and bases don't play well with the metal. Things will swell, and the batteries will get wedged in there. Then you have a pile of Maglights that you occasionally think about contacting the manufacturer for a return.