The U21 can be purchased from Amazon via: www.amazon.com/dp/B01G526CE4
(I do NOT make any referrals from this)
Further info can also be found on mfg's website: www.mankerlight.com
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TABLE OF CONTENTS:
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INTRO - 0:00
PACKAGING & ACCESSORIES - 0:15
MFG SPECS - 0:32
DESIGN & FEATURES - 0:39
~XHP35 HI close up - 1:10
~Low Voltage Warning Indicator - 5:00
CHARGING FUNCTIONALITY - 5:19
SIZE COMPARO - 7:11
UI & OUTPUT LEVELS - 7:33
~Group 1 modes - 7:40
~Group 2 modes - 9:00
BEAM / HOTSPOT PROFILE - 10:48
THROW MEASUREMENTS (@ 4 meters) - 12:43
~Shadow JM26 | 3,680 lux - 12:43
~Manker U21 | 8,240 lux - 13:17
~ThruNite TN31 XM-L2 | 9,120 lux - 13:47
~ThruNite TN31 XM-L2 (post step-down) | 8,420 lux - 14:27
THROW SUMMARY - 14:36
OUTDOORS THROW COMPARO - 16:54
~Control Light: ThorFire VG10 - 16:54
~ThruNite TN31 XM-L2 - 17:44
~Manker U21 - 18:40
~Side-by-side TN31 vs U21 - 19:19
RUNTIME & LUMENS MEASUREMENT (MAX) - 19:58
~Low battery voltage warning - 16:50
INITIAL SUMMARY - 23:56
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Disclosure: U21 provided by Manker for review.