Klarus G15 vs ThruNite TC20 V3 size comparison
The ThruNite TC20 V3 is 4 mm (0.16 in) longer than the Klarus G15, and 8 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The ThruNite TC20 V3 is 4 mm (0.16 in) longer than the Klarus G15, and 8 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| Klarus G15 Check price ↗ | ThruNite TC20 V3 Check price ↗ | |
| Length | 121 mm (4.76 in) | 125 mm (4.92 in)+4 mm |
| Head / width | 27 mm (1.06 in) | 35 mm (1.38 in)+8 mm |
| Body | 25 mm (0.98 in) | 28 mm (1.10 in)+3 mm |
| Weight | 70 g listed | 197 g with battery |
| Battery | 21700 | 21700 |
| Max output | 4,200 lm | 4,720 lm |
| Throw | 200 m | — |
| Type | EDC | EDC |
| Price | $79.95 at batteryjunction.com, as of Nov 4, 2026 | $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | batteryjunction.com sourced |
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G15 vs TC20 V3: how they differ
Size and weight
The Klarus G15 is the shorter light: 121 mm (4.76 in) against 125 mm (4.92 in), a difference of 4 mm (3%). At its widest point the Klarus G15 is 8 mm slimmer (27 vs 35 mm). Weights are published on different bases (Klarus G15: 70 g listed; ThruNite TC20 V3: 197 g with battery), so they are not directly comparable.
Brightness and throw
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 4,200 lm for the Klarus G15, 12% more.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Klarus G15 was $79.95 at batteryjunction.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Klarus G15 if you want a shorter light (4 mm shorter) and a slimmer profile (8 mm narrower). Choose the ThruNite TC20 V3 if you want more output (4,720 lm vs 4,200 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Klarus G15 Check price ↗ ThruNite TC20 V3
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
G15 vs TC20 V3 FAQ
Which is smaller, the Klarus G15 or the ThruNite TC20 V3?
The Klarus G15 is the shorter light: 121 mm (4.76 in) against 125 mm (4.92 in), a difference of 4 mm (3%). At its widest point the Klarus G15 is 8 mm slimmer (27 vs 35 mm). Weights are published on different bases (Klarus G15: 70 g listed; ThruNite TC20 V3: 197 g with battery), so they are not directly comparable.
Which is brighter, the Klarus G15 or the ThruNite TC20 V3?
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 4,200 lm for the Klarus G15, 12% more.
Which is cheaper, the Klarus G15 or the ThruNite TC20 V3?
When we checked on Nov 4, 2026, the Klarus G15 was $79.95 at batteryjunction.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com. Prices change often, so check the current price before you buy.
Do the Klarus G15 and ThruNite TC20 V3 use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Klarus G15 with similar lights
Compare ThruNite TC20 V3 with similar lights
More
Sources
- Klarus G15: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
- ThruNite TC20 V3: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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