Not to mention that IMO, AA batteries are an asset on vintage portable electronics. The last thing I need is to search for overly expensive, and possibly alread

Not to mention that IMO, AA batteries are an asset on vintage portable electronics. The last thing I need is to search for overly expensive, and possibly already dead, battery packs on eBay when mine turns into a spicy pillow. AA batteries are much easier to acquire, and can be rechargeable to reduce environmental impact.