Mental Gear Reduction
Wise, Aged Ars Veteran
Finding an actual new battery may be difficult, unless they used a standard size. (I'm not too clear on what those are, beyond whatever gets used in e-cigs.) What often happens is that a bunch of batteries get made, and most go into products, while the remainder sit on the shelves. So even if you buy a 'new' battery, it may have years of sitting in storage.Sure, but, I know I sound like a shill, this device does what it can to avoid that. Built into the software/firmware is a setting to never charge the battery over 80%, which I use. Also, it is a simple plastic case, easy to open up. I believe it was made that way on purpose. I haven't tried, but I expect the battery is easily user-replaceable.
Example: I tried to replace a Kindle battery once. That did not go well. I tried three "new" batteries, and all of them were bad.
My ancient DAC/amp should still work, because it just uses AAs, but anything with lithium-ion may be troublesome. Lithium polymer batteries have much longer storage lives, so they stretch longevity to like ten years, but then you're possibly stuck again if they used a custom pack. It's a damn shame to have to throw out a perfectly good device because of battery problems.
edit: and with audio being mostly a solved problem, electronics can last a long time.