Mark some of the batteries have a LEAN to them , put them on a table bottom down IF there is a lean put this one in the tube LAST this should help.Waiting on the new Pro. My Infinity now has an "expert user" mode -- periodically have to hit the bottom to get the batteries back working again. Something has to be slightly out of kilter, it does this with all 3 pairs of batteries, which are otherwise charging fine, not disformed, provide long run time between charges. Darned thing is, it does work well if I do this, and it's preferable to sending it back on RMA (I'd rather slap it once in a while rather than lose it for even a week)