Since you bought juke wheels it doesn't help much but you can fit TPMS to any wheel with adapters. There are 2 styles, one is just a big strap that goes around the wheel, the second (which I have on my 2 piece wheels) has a stem with a small O opening at the bottom and then the stock TPMS screws into that. In both cases the TMPS is 100% inside the wheel and you fill the air from another valve.
Battery life has been said 5 to 12 years and up to 100,000 miles. I think that a non OEM TPMS is likely to not last as long as an OEM one. That's one of the reasons I got the latest version, D I think. The link I sent you was C. I think they were using A or B back when the leaf first came out (would have to search to confirm this). So it's a safe guess that they shouldn't be more than 3 years old already.
I figure the cost of replacing 1 or 2 sensors that fail with used sensors again is still less than buying 4 new OEM ones.
2015 White SV, after one month 292 GIDS
Best 1 charge drive, 229km (143miles)