Conman, I thought those batts were going to be fun. I put them in a 2AA box first and had trouble with 2 pair so I parked them for now.
The first pair worked good for a couple of cycles. Then right after putting them in, I took a couple hits before I snapped the cover back on. One got hot, heatshrink melting, I yanked it out.
I ordered a second pair, and after the 1st or second cycle one of the pair wouldn't charge and read over-discharged. So I parked them for now. I'm thinking when I get my mod bug back, I'll use them in 3.7 mini's.
I may have had bad sets.... just keep an eye on them. You might want to use a rubber band for a couple of days so you don't have to get those screws out in a hurry!
Looks great though!