In-depth vid review of the TK05's big bro the TK18:
RUNTIME (TURBO)
- timed step-down @ ~3min
- slight bump in output w/2 x LiFEPO4's (potentially higher with 2 x 16340's but I don't have a pair of healthy cells to test with atm) and even after step down
- wasn't able to meet output claims with 18650 (989lms) or 2 x LiFEPO4's (1060lms)
- total runtime on 18650 far exceeds mfg claims (~4 hrs vs. 45 min)
- suggest sticking w/2 x R/CR123's for overall highest output if long runtime not required
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Disclosure: TK18 provided by ThorFire for review.