Many thanks to SWLing Post reader, Bill, who writes:
Maybe you already know this, but I only recently discovered the Tecsun PL-880 rechargeable battery is available on Amazon for $9.99 and can qualify for Prime free shipping. I bought one and it seems to work great. There are other battery models on Amazon that may work, but many had comments about inconsistent quality, various countries of origin and even various sizes! I decided to go with this one branded as Tecsun to play it safe and am happy. Just an FYI to your readers.
Thanks, Bill! I have two PL-880 batteries and they continue to do a fine job running the PL-880. They are over two years old now (hard to believe–!), so I’ll keep Amazon in mind. Note that Universal Radio also has the replacement battery for $9.95 (though no free shipping).