what is the difference between 18650GAs and the 18650 P1835J?

Sorry if this is a Niave question,but what is the difference are they different manufacturers?I have both and both are protected,but yhe PJ’S seem to bee heavier and more dense I haven’t seen a visible difference in out put or any obvious sings in runtime.
thanks all !

Protected Keeppower 3500mAh P1835J are supposed to contain a Panasonic/Sanyo NCR18650GA cell.

What brand is your other battery?

light wolf thanks .my other brand are the Kaidomain 18650 GAs