ThruNite TC15 V3 vs ThruNite TC20 V3 size comparison
The ThruNite TC20 V3 is 3 mm (0.12 in) longer than the ThruNite TC15 V3, 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 3 mm (0.12 in) longer than the ThruNite TC15 V3, and 8 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| ThruNite TC15 V3 Check price ↗ | ThruNite TC20 V3 Check price ↗ | |
| Length | 122 mm (4.80 in) | 125 mm (4.92 in)+3 mm |
| Head / width | 27 mm (1.06 in) | 35 mm (1.38 in)+8 mm |
| Body | 23 mm (0.91 in) | 28 mm (1.10 in)+5 mm |
| Weight | 74 g listed | 197 g with battery |
| Battery | 18650 | 21700 |
| Max output | 2,403 lm | 4,720 lm |
| Throw | 223 m | — |
| Type | EDC | EDC |
| Price | $59.99 at batteryjunction.com, as of Nov 4, 2026 | $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced Retailer lists W 27 x H 23 mm | batteryjunction.com sourced |
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TC15 V3 vs TC20 V3: how they differ
Size and weight
The ThruNite TC15 V3 is the shorter light: 122 mm (4.80 in) against 125 mm (4.92 in), a difference of 3 mm (2%). At its widest point the ThruNite TC15 V3 is 8 mm slimmer (27 vs 35 mm). Weights are published on different bases (ThruNite TC15 V3: 74 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 2,403 lm for the ThruNite TC15 V3, 96% more.
Battery
The ThruNite TC15 V3 runs on a removable 18650 battery; the ThruNite TC20 V3 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Price
When we checked on Nov 4, 2026, the ThruNite TC15 V3 was $59.99 at batteryjunction.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC15 V3 cost $19.96 less. 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 ThruNite TC15 V3 if you want a shorter light (3 mm shorter) and a slimmer profile (8 mm narrower). Choose the ThruNite TC20 V3 if you want more output (4,720 lm vs 2,403 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ ThruNite TC15 V3 Check price ↗ ThruNite TC20 V3
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TC15 V3 vs TC20 V3 FAQ
Which is smaller, the ThruNite TC15 V3 or the ThruNite TC20 V3?
The ThruNite TC15 V3 is the shorter light: 122 mm (4.80 in) against 125 mm (4.92 in), a difference of 3 mm (2%). At its widest point the ThruNite TC15 V3 is 8 mm slimmer (27 vs 35 mm). Weights are published on different bases (ThruNite TC15 V3: 74 g listed; ThruNite TC20 V3: 197 g with battery), so they are not directly comparable.
Which is brighter, the ThruNite TC15 V3 or the ThruNite TC20 V3?
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 2,403 lm for the ThruNite TC15 V3, 96% more.
Which is cheaper, the ThruNite TC15 V3 or the ThruNite TC20 V3?
When we checked on Nov 4, 2026, the ThruNite TC15 V3 was $59.99 at batteryjunction.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC15 V3 cost $19.96 less. Prices change often, so check the current price before you buy.
Do the ThruNite TC15 V3 and ThruNite TC20 V3 use the same battery?
The ThruNite TC15 V3 runs on a removable 18650 battery; the ThruNite TC20 V3 runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Compare ThruNite TC15 V3 with similar lights
Compare ThruNite TC20 V3 with similar lights
More
Sources
- ThruNite TC15 V3: specs from manufacturer published specs as listed by batteryjunction.com. Price $59.99 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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