Fenix HL16 AAA vs Olight i3T EOS size comparison
The Olight i3T EOS is 25 mm (0.98 in) longer than the Fenix HL16 AAA, and 33 mm narrower at its widest point. It is 56 g lighter (with battery).
The Olight i3T EOS is 25 mm (0.98 in) longer than the Fenix HL16 AAA, and 33 mm narrower at its widest point. It is 56 g lighter (with battery).
Dimensions
| Fenix HL16 AAA Check price ↗ | Olight i3T EOS Check price ↗ | |
| Length | 64 mm (2.52 in) | 89 mm (3.50 in)+25 mm |
| Head / width | 48 mm (1.89 in) | 15 mm (0.59 in)−33 mm |
| Body | — | 15 mm (0.59 in) |
| Thickness | 27 mm (1.06 in) | — |
| Weight | 97.2 g with battery and headband | 41 g with battery−56 g |
| Battery | 3x AAA | AAA |
| Max output | 450 lm | 180 lm |
| Throw | 104 m | — |
| Type | Headlamp / right-angle | EDC |
| Price | $29.95 at fenixlighting.com, as of Nov 4, 2026 | $17.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced Headlamp unit; front view drawn width x height | batteryjunction.com sourced |
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HL16 AAA vs i3T EOS: how they differ
Size and weight
The Fenix HL16 AAA is the shorter light: 64 mm (2.52 in) against 89 mm (3.50 in), a difference of 25 mm (28%). At its widest point the Olight i3T EOS is 33 mm slimmer (15 vs 48 mm). The Olight i3T EOS is 56 g lighter (41 g vs 97.2 g, with battery and headband).
Brightness and throw
The Fenix HL16 AAA is rated brighter: 450 lm maximum vs 180 lm for the Olight i3T EOS, 150% more.
Battery
The Fenix HL16 AAA runs on removable 3x AAA batteries; the Olight i3T EOS runs on a removable AAA battery.
Price
When we checked on Nov 4, 2026, the Fenix HL16 AAA was $29.95 at fenixlighting.com and the Olight i3T EOS $17.99 at olight.com, so the Olight i3T EOS cost $11.96 less. Prices change often, so check the current price before you buy.
Type
The Fenix HL16 AAA is listed as headlamp / right-angle and the Olight i3T EOS as edc, so they suit different jobs.
Which should you buy?
Choose the Fenix HL16 AAA if you want a shorter light (25 mm shorter) and more output (450 lm vs 180 lm). Choose the Olight i3T EOS if you want a slimmer profile (33 mm narrower) and less weight (56 g lighter). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix HL16 AAA Check price ↗ Olight i3T EOS
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
HL16 AAA vs i3T EOS FAQ
Which is smaller, the Fenix HL16 AAA or the Olight i3T EOS?
The Fenix HL16 AAA is the shorter light: 64 mm (2.52 in) against 89 mm (3.50 in), a difference of 25 mm (28%). At its widest point the Olight i3T EOS is 33 mm slimmer (15 vs 48 mm). The Olight i3T EOS is 56 g lighter (41 g vs 97.2 g, with battery and headband).
Which is brighter, the Fenix HL16 AAA or the Olight i3T EOS?
The Fenix HL16 AAA is rated brighter: 450 lm maximum vs 180 lm for the Olight i3T EOS, 150% more.
Which is cheaper, the Fenix HL16 AAA or the Olight i3T EOS?
When we checked on Nov 4, 2026, the Fenix HL16 AAA was $29.95 at fenixlighting.com and the Olight i3T EOS $17.99 at olight.com, so the Olight i3T EOS cost $11.96 less. Prices change often, so check the current price before you buy.
Do the Fenix HL16 AAA and Olight i3T EOS use the same battery?
The Fenix HL16 AAA runs on removable 3x AAA batteries; the Olight i3T EOS runs on a removable AAA battery.
Compare Fenix HL16 AAA with similar lights
Compare Olight i3T EOS with similar lights
More
Sources
- Fenix HL16 AAA: specs from Fenix product page (manufacturer). Price $29.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight i3T EOS: specs from Olight product page (manufacturer); manufacturer published specs as listed by batteryjunction.com. Price $17.99 from olight.com, checked Nov 4, 2026; prices change often.
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