Contender to this (very nice) flashlight is Eagletac P100A2, and also Klarus PT20. I like the simplicity and format of these flashlights and may be getting some for emergency use and loaning to non-flashaholics who might find hard to get along with complex UIs.
BA20 & BA10 are very simple robust lights I have been giving them as gifts to friends and family, biggest plus point are common standard battery and very simple interface. Mostly i gift the BC10’s as straight replacements for the Fenix E11’s i use to.
Updated newer versions of BC20 can utilize 18650 battery types according to Jetbeam has anyone used Panasonic 3400mah protected cells in the new version ?