For what its worth, if a person were so inclined, they could go to a hardware store a purchase a replacement battery for any lithium ion drill, and with some effort diassemble it. The effort is by no means trivial, and not without some danger, but generally you will find high discharge batteries like the VTC5, VTC5A, 25R5, or HG2 in them. They generally keep the OEM wrap intact, but given that they are inside the battery, it is a bit of a gamble as to what you would get for you effort. Make sure you are careful about how you disassemble the pack, and use extreme caution pushing the discharge rating unless you are very sure what you have. I’ll say I know this is true for the Makita brand in the USA because I dropped a battery from a scaffold and inside it were the old Samsung 25R2’s, but I did not salvage them for vaping use.