Larry Jaques wrote:

(...)

Do you need to ship the whole (read: heavy) battery to them, or could
you just ship the case and one cell?

I shipped them the batteries unmolested.
Cost me U$13 to send them 5 packs, 2324 miles away.

That's not too bad. As Calif Bill mentioned, I could
have saved 3 bucks off that by using a USPS 'flat rate'
box.

I found that disassembling these particular battery packs
to be an exercise in futility. They come apart in a way
that precludes reassembly. DAMHIKT

--Winston --Comes apart in a way that precludes reassembly.