hello183
There are 18650 cells and there are 18650 cells!
![Eek! :eek: :eek:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Top quality ones can handle a reasonable number of amps but never 60! Even the best from major manufacturers like Samsung and Sony can only manage 25A max but are correspondingly expensive. Cheap 18650 as found on Ebay are likely to drop their voltage at just a few amps.
Some time ago I built this plane that uses 18650 cells.
Four individual cells held
inside the wing spar in a 2s2p configuration so they deliver 7.4V.
The cells were very cheap but with a small motor it only needed a total of 6A. Even so the cells had nothing like their marked 3000 mAh capacity, actually less than 1000! so were pretty heavy relative to a LiPo for the power they delivered.
Be aware that laptop cells are required to deliver their full capacity not high amps, in fact less than 3 amps continuous.