Comparison Console
Fenix TK21R vs Nitecore EDC37
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Nitecore EDC37 stands out as the lightest option for weight, with about a 10% gap from the closest alternative. Fenix TK21R stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative. Nitecore EDC37 stands out as the highest output option for max lumens, with about a 122% gap from the closest alternative.
Decision Signals
What stands out
Fenix TK21R stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative.
Nitecore EDC37 stands out as the most expensive option for retail price, with about a 7% gap from the closest alternative.
Nitecore EDC37 stands out as the lightest option for weight, with about a 10% gap from the closest alternative.
Fenix TK21R stands out as the heaviest option for weight, with about a 11% gap from the closest alternative.
Fenix TK21R stands out as the lowest output option for max lumens, with about a 55% gap from the closest alternative.
Nitecore EDC37 stands out as the highest output option for max lumens, with about a 122% gap from the closest alternative.
Fenix TK21R stands out as the shortest runtime option for max runtime, with about a 62% gap from the closest alternative.
Nitecore EDC37 stands out as the longest runtime option for max runtime, with about a 162% gap from the closest alternative.
Specification Profile
Relative dimensions at a glance
Each axis is normalized against the largest raw value among the products in this comparison. Farther outward means a larger value, not necessarily a better result. Axes with an unverified value are omitted.
Price & carry
Retail price
US$130.43Cheapest
US$140Most expensive
Weight
221.4 g (7.81 oz)Heaviest
199 g (7.02 oz)Lightest
Length
153.3 mm (6.04 in)Longest
108 mm (4.25 in)Shortest
Output
Max lumens
3600 lmLowest output
8000 lmHighest output
Max candela
Unknown
44010 cd
Beam distance
480 m (1575 ft)Highest
420 m (1378 ft)Lowest
Max runtime
4350 minShortest runtime
11400 minLongest runtime
Power & durability
Battery type
21700 lithium-ion
Built-in Li-ion battery
Charging type
USB Type-C
USB-C fast charging (18W)
Rechargeable
Yes
Yes
IP rating
IP68
IP54
Impact resistance
1.5 m (5 ft)Lowest
2 m (7 ft)Highest
Material
Aluminum alloy A6061-T6
Stainless steel with PVD coating and carbon fiber reinforced polymer frame with aluminum heat dissipation plate
Use case profile
Best for
Tactical usePatrollingSearch and rescueTraffic inspectionSelf-defense
Tactical EDCSecurity patrolLaw enforcementSearch and rescuePersonal defenseEmergency lighting
Common praise
Very bright with strong beamSolid build qualityIP68 waterproof ratingLong runtimeFast USB-C chargingComfortable size for tactical useImproved tactile switch feel
High maximum brightness for compact sizeUseful OLED real-time display with mode, brightness, battery and runtime infoPhysical lockout switch prevents accidental activationGood output regulation with temperature managementSolid build quality with tactical designFast USB-C charging with large built-in batteryMultiple usable modes including flood and spotlight
Common complaints
Larger size compared to some EDC flashlightsNo detailed mode descriptions available
IP54 rating lower than typical IP67/IP68 for full waterproof useBattery is not user replaceableMomentary high output duration limited by thermal regulation
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