Comparison Console
Nitecore TM20K vs Nitecore TM39
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Nitecore TM20K stands out as the lightest option for weight, with about a 69% gap from the closest alternative. Nitecore TM20K stands out as the cheapest option for retail price, with about a 40% gap from the closest alternative. Nitecore TM20K stands out as the highest output option for max lumens, with about a 285% gap from the closest alternative.
Decision Signals
What stands out
Nitecore TM20K stands out as the cheapest option for retail price, with about a 40% gap from the closest alternative.
Nitecore TM39 stands out as the most expensive option for retail price, with about a 67% gap from the closest alternative.
Nitecore TM20K stands out as the lightest option for weight, with about a 69% gap from the closest alternative.
Nitecore TM39 stands out as the heaviest option for weight, with about a 223% gap from the closest alternative.
Nitecore TM39 stands out as the lowest output option for max lumens, with about a 74% gap from the closest alternative.
Nitecore TM20K stands out as the highest output option for max lumens, with about a 285% gap from the closest alternative.
Nitecore TM20K stands out as the shortest runtime option for max runtime, with about a 64% gap from the closest alternative.
Nitecore TM39 stands out as the longest runtime option for max runtime, with about a 177% 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$299.95Cheapest
US$499.95Most expensive
Weight
422 g (14.89 oz)Lightest
1361 g (48.01 oz)Heaviest
Length
145.5 mm (5.73 in)Shortest
276 mm (10.87 in)Longest
Output
Max lumens
20000 lmHighest output
5200 lmLowest output
Max candela
22200 cdLowest candela
562500 cdHighest candela
Beam distance
290 m (951 ft)Lowest
1500 m (4921 ft)Highest
Max runtime
780 minShortest runtime
2160 minLongest runtime
Power & durability
Battery type
Built-in 2 x 21700 Li-ion rechargeable batteries, 9600mAh total capacity
NBP68 HD rechargeable battery pack (98Wh, 3400mAh x8, 3.7V)
Charging type
USB-C with Quick Charge support
Built-in charging port via AC adapter (3.5mm)
Rechargeable
Yes
Yes
IP rating
IP68
IP68 (up to 2m submersible)
Impact resistance
1 m (3 ft)
1 m (3 ft)
Material
Aero grade aluminum alloy with HA III military grade hard-anodized finish
Aviation grade aluminum alloy with Military grade HA III hard anodized finish
Use case profile
Best for
Tactical activitiesSearch and rescueOutdoor activitiesIndustrial useSelf-preservation and active threat mitigation
Search and rescueHuntingExplorationLong-range illumination
Common praise
Extremely high brightness outputSolid and durable CNC machined unibody constructionVersatile dual switch with tactical featuresStable output with advanced thermal regulationGood waterproofing and impact resistance
Extremely powerful beam with impressive long throwDurable build with waterproof and impact resistanceUser-friendly double-button interface with OLED displayLong runtime on lower modes with included large battery pack
Common complaints
Relatively heavy and bulky for everyday carryBurst mode duration is short
Large size and weight limits portability for everyday carryHigher brightness modes have shorter runtimePremium price point
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