Well my left & right Touch batteries last pretty much the same, maybe a few hours less for the right as that's my dominant hand.
1-2 days is way too short, possibly it's not gong to sleep, Is there any indication of that?... i.e. is it instantly connected as soon as you go into VR... whereas the right controller waits until you press a button?
I would suggest a first test would be to remove the left battery when not using it, if that extends the life back to normal then that will at least confirm it’s a hardware or software issue and not a battery problem.
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