Is there a "better" way to approach this?
Well I'd look at it this way. What is it you use AA and AAA batteries for? Are they important to you? Can they be replaced by devices that either use fewer or more robust rechargeable batteries?
I've been converting everything I can to utilize USB power sources here lately. That includes my charger for small rechargeable batteries. I found a small USB charger that can charge anything from AAA to 18650, but can only do 2 batteries at a time. This isn't really a problem though, as I don't have many devices that use small rechargeable batteries, and I have some spares to use while the others charge, if I even need to.
I'm quickly becoming a huge fan of the 18650 battery. It's bigger, but seems to replace the 2-3 smaller batteries that were usually needed for most devices that use it. For any future flashlights I get I'm probably going to be sticking with that battery, and anything else I can find that uses it.
The other day I was somewhat disappointed, but I removed my trusty Maglite from it's spot wedged into my center console and took it in the house to maybe never be used again. Fact is, I never used it anyway. It was a model that uses 3 D batteries, and did have a LED bulb. Problem is, it's huge, it's heavy, it does not pack well, and it does not put out that much light. The tiny single 18650 battery light I keep clipped in my pocket can outdo it in brightness by a long shot, and when turned down on lower settings can last forever as well. There is also the fact D batteries are oddball, kind of like the C batteries in a lantern I keep around that might be on it's way out next.
So I'd probably look for ways to minimize or reduce the need for a complex or permanent install of a small battery charger by consolidating the types of battery you use and updating your devices that use small batteries. That way what few you do have can be easily charged up as needed with a small charger you can keep stowed away when not in use.