Comparison Console
Fenix TK21R vs Nitecore SRT7i
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Nitecore SRT7i stands out as the lightest option for weight, with about a 21% gap from the closest alternative. Nitecore SRT7i stands out as the cheapest option for retail price. Fenix TK21R stands out as the highest output option for max lumens, with about a 20% gap from the closest alternative.
Decision Signals
What stands out
Nitecore SRT7i stands out as the cheapest option for retail price.
Fenix TK21R stands out as the most expensive option for retail price.
Nitecore SRT7i stands out as the lightest option for weight, with about a 21% gap from the closest alternative.
Fenix TK21R stands out as the heaviest option for weight, with about a 27% gap from the closest alternative.
Nitecore SRT7i stands out as the lowest output option for max lumens, with about a 17% gap from the closest alternative.
Fenix TK21R stands out as the highest output option for max lumens, with about a 20% gap from the closest alternative.
Fenix TK21R stands out as the shortest runtime option for max runtime, with about a 91% gap from the closest alternative.
Nitecore SRT7i stands out as the longest runtime option for max runtime, with about a 1003% 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$130.43Most expensive
US$129.95Cheapest
Weight
221.4 g (7.81 oz)Heaviest
175 g (6.17 oz)Lightest
Length
153.3 mm (6.04 in)Shortest
163 mm (6.42 in)Longest
Output
Max lumens
3600 lmHighest output
3000 lmLowest output
Max candela
Unknown
87500 cd
Beam distance
480 m (1575 ft)Lowest
580 m (1903 ft)Highest
Max runtime
4350 minShortest runtime
48000 minLongest runtime
Power & durability
Battery type
21700 lithium-ion
Nitecore 21700i Li-ion battery (NL2150HPi 5000mAh)
Charging type
USB Type-C
USB Type-C
Rechargeable
Yes
Yes
IP rating
IP68
IP68
Impact resistance
1.5 m (5 ft)Lowest
2 m (7 ft)Highest
Material
Aluminum alloy A6061-T6
Aero grade aluminum alloy with HA III military grade hard-anodized finish
Use case profile
Best for
Tactical usePatrollingSearch and rescueTraffic inspectionSelf-defense
Law enforcementTactical operationsHuntingSearchHigh-risk patrols
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 of 3000 lumensLong beam throw of 580 metersGood battery capacity with included 21700 5000mAh rechargeable batterySmart selector ring enables easy one-handed controlDurable build with IP68 waterproofing and 2m impact resistanceFast USB-C charging portMultiple user-friendly modes including strobe and turboEffective tail stand capability for safety
Common complaints
Larger size compared to some EDC flashlightsNo detailed mode descriptions available
Relatively heavy with battery at 175 gramsNo CR123A batteries included with adapter sold separatelySome users may find the size large for EDC
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