Comparison Console
Fenix TK21R vs ThruNite TN4A HI
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
ThruNite TN4A HI stands out as the lightest option for weight, with about a 1% gap from the closest alternative. Fenix TK21R stands out as the highest output option for max lumens, with about a 243% gap from the closest alternative. ThruNite TN4A HI stands out as the longest runtime option for max runtime, with about a 2466% gap from the closest alternative.
Decision Signals
What stands out
ThruNite TN4A HI stands out as the lightest option for weight, with about a 1% gap from the closest alternative.
Fenix TK21R stands out as the heaviest option for weight, with about a 1% gap from the closest alternative.
ThruNite TN4A HI stands out as the lowest output option for max lumens, with about a 71% gap from the closest alternative.
Fenix TK21R stands out as the highest output option for max lumens, with about a 243% gap from the closest alternative.
Fenix TK21R stands out as the shortest runtime option for max runtime, with about a 96% gap from the closest alternative.
ThruNite TN4A HI stands out as the longest runtime option for max runtime, with about a 2466% gap from the closest alternative.
ThruNite TN4A HI stands out as the shortest option for length, with about a 27% gap from the closest alternative.
Fenix TK21R stands out as the longest option for length, with about a 37% 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$130.43
Unknown
Weight
221.4 g (7.81 oz)Heaviest
218.6 g (7.71 oz)Lightest
Length
153.3 mm (6.04 in)Longest
111.5 mm (4.39 in)Shortest
Output
Max lumens
3600 lmHighest output
1050 lmLowest output
Max candela
Unknown
52340 cd
Beam distance
480 m (1575 ft)Highest
457 m (1499 ft)Lowest
Max runtime
4350 minShortest runtime
111600 minLongest runtime
Power & durability
Battery type
21700 lithium-ion
4 x AA batteries (NiMH 2450mAh)
Charging type
USB Type-C
Unknown
Rechargeable
Yes
Yes
IP rating
IP68
IPX-8 (1.5 meters)
Impact resistance
1.5 m (5 ft)Lowest
2 m (7 ft)Highest
Material
Aluminum alloy A6061-T6
Aircraft grade aluminum with type III hard anodized finish
Use case profile
Best for
Tactical usePatrollingSearch and rescueTraffic inspectionSelf-defense
Extended throw distanceCompact AA powered flashlightUsers needing economical and readily available battery options
Common praise
Very bright with strong beamSolid build qualityIP68 waterproof ratingLong runtimeFast USB-C chargingComfortable size for tactical useImproved tactile switch feel
Compact size with large diameter tube for grip comfortPowerful long throw comparable to larger lightsSmooth anodizing and high build qualityGood runtime on NiMH batteriesClear AR coated tempered glass lensIntelligent thermal control to prevent overheating
Common complaints
Larger size compared to some EDC flashlightsNo detailed mode descriptions available
No batteries includedNo built-in rechargeable battery or charging portStandard side switch UI can be slightly unintuitive
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