3x 1300 mAh in series is still 1300mAh no matter what the battery...
so a 1300 mAh 3 cell battery will be equal to about 14.48 Watt Hours.
2x 18650 at 2500 mAh will be equal to 18.5 Watt Hours.
My 2 2800 mAh 18650 equal 20.72 watt hours..
Simply put the dual 18650 will just outlast the 1300 lipo, plus you can change easily to a new fresh pair if your out and about and no usb charge available.
so a 1300 mAh 3 cell battery will be equal to about 14.48 Watt Hours.
2x 18650 at 2500 mAh will be equal to 18.5 Watt Hours.
My 2 2800 mAh 18650 equal 20.72 watt hours..
Simply put the dual 18650 will just outlast the 1300 lipo, plus you can change easily to a new fresh pair if your out and about and no usb charge available.