There are many different kinds of battery cases. I have them for 123as!
You go to eBay. Your order from Red China. Over the last 2 years, I bought many plastic cases. If I have two different types of the same battery, like 18650s, I buy two different colored cases. Otherwise, they are clear.
Problem solved. The battery cases can come in 2s, 4s, 8, and multiple types of batteries in one plastic case. Just look!
I had a battery experience today and this is as good a place to post it.
The following comments may be of assistance. Essentially, there are one use akaline AA which may be 7 year shelf life for Costco brand and 10 years for name brand. The lithium AA have a shelf life of 20 years! The rechargeable AA can do a minimum of 500 recharging cycles. All will fit into C and D battery shells so you don't have to buy C and D batteries anymore.
My remaining life expectancy is less than 20 years, but I have about a 25% chance of making the 20.
Some points are obvious. If you have rechargeables, can keep track of them, regularly recharge and the applications aren't critical, they are great for routine usage.
If you have a shtf emergency, handheld walkie talkies and flashlights will gooble up batteries like there is no tomorrow. As a practical matter, you probably cannot keep enough solar rechargers at home without adding a shed!
The lithium batteries cost about 3x the price of an alkaline. The problem is that you cannot tell when shtf will occur. In the past, I had kept alkalines past the nominal expiration point - there weren't decent rechargeables or lithium batteries on the market.
I have been keeping blister packs of alkalines with the handitalkers and with the radios. I won't be using them until shtf. In the real world, and not the ultra efficient discussion world in forums, I tend to pack things away, have difficulty finding them and so forth. So, now, I am replacing the blister packs of alkalines stored with the shtf radios with blister packs of lithium batteries.