I’m looking at this as a 18650 bored up to 20700. I’ve measured all of the Solarforce host and none of them have enough thickness for the tail cap. I did this thread for those who might want that little extra capacity the 20700 Sanyo gives.
SANYO NCR20700B 4250 mAh High Discharge Flat Top
Specifications:
Nominal Capacity: 4000 mAh
Typical Capacity: 4250mAh
Nominal Voltage: 3.7V
Standard Charging Current: 2A
Discharge End Voltage: 2.5V
Max Continuous Discharging Current: 12A
Weight (max): 63.0g
Dimensions:
70.3mm (L) x 20.35 mm (D)