Rechargeable batteries have come a long way over the years. The nickel metal hydride (NiMH) batteries are better than the NiCad batteries so many of us have used over the years, and they’re improving all the time with more storage capacity for powering devices longer.
In fact, they’re comparable to alkaline batteries these days, and that didn’t used to be the case with rechargeables. The prices are economical, especially when you consider they can be used hundreds of times. They cost a small fraction of what you’d spend on hundreds of sets of alkaline batteries.
Stock up on the batteries you need now and for the future. Get plenty for your survival kits because you never know when you’ll need to have rechargeable batteries on hand.