16650 in surefires?

[DE73]

Which is the best 16650 battery for a not bored Surefire?

 

[Bogie]

All of mine are KeepPower from Illumn without issue

 

[Dave D]

Another recommendation for KeepPower, they are the only brand that I buy now, available in Europe from NKON.NL, there may be other suppliers.

 

[DE73]

Whats the opinion about KeepPowers usb rechargeable 16650? Should be easy when your traveling and don't need to carry spare batteries and dedicated charger.