Good battery
I bought this for my Olight S1 Baton, as my previous rechargeable battery didn't have the high output capacity to sustain the turbo mode . It's not pleasant to have your light cut off by the battery protection circuit. Happily, this battery is up to the job, so I can enjoy turbo mode without having to think about it beforehand. Fenix batteries are well made; certainly a lithium battery brand that can be trusted. Obligatory praise here for Heinnies - their customer service is second to none.