I fixed 'em! YMMV, but I took a small screwdriver, not eyeglass small, just a small standard screwdriver. I stood the carto thread side up, put the screwdriver on the post and tapped the top of the screwdriver with a small hammer lightly a few times. It drove the post into the carto a bit... enough to allow the threads to catch. Now the cartos screw on all batteries and adapters!
I metered the cartos to be sure there was no change to the ohms before and after, and they didn't change. The ones I've filled work perfectly, just like my older CoolCarts!
N<----happy camper![]()
YAAAAAY! (I hate it when things don't work properly -- especially things as mission-critical as cartos!