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Acebeam P17 Defender: 4,900 Lumens with Constant-Current Boost Regulation
Built around a highly efficient constant-current boost driver and a de-domed CREE XHP70.3 HI LED, the Acebeam P17 Defender delivers a flat-regulated 4,900-lumen burst paired with a verified 445 meters (486 yards) of clean throw. Engineered specifically for duty carry, its mechanical dual-tail switch interface provides instant, high-output control without the need to fumble with a side switch.
For First Responders
- Intuitive UI: The mechanical dual-tail switch system gives you muscle-memory access to One-Touch Strobe and a 4,900-lumen Turbo burst straight from off. It completely eliminates user-interface confusion when operating under heavy stress.
- Recoil & Impact Stabilization: Dual internal gold-plated springs keep the 21700 battery locked firmly in place, ensuring the circuit stays closed so the light won't flicker or shut down under hard impacts.
- Crenellated Bezel: Features a hardened strike bezel embedded with 3 silicon nitride ceramic beads designed for emergency glass-breaking.
For Outdoorsmen & Search & Rescue
- Flat Boost Regulation: Unlike cheaper linear or FET-heavy setups that experience sudden drops in brightness, the high-efficiency constant-current boost driver maintains a stable, flat output throughout the runtime cycle as the battery drains.
- High-Candela Beam Profile: Utilizing a high-intensity (HI) de-domed emitter allows the P17 to punch out 49,506 cd of peak beam intensity. This throws a tightly focused hotspot to cut through dense brush and fog while retaining enough useful spill for spatial peripheral awareness.
- Submersible Architecture: Fully dustproof and waterproof carrying an IP68 rating certified for submersions down to 1.5 meters (5 feet), ensuring continuous operational reliability during extreme storms.
For Flashlight Enthusiasts
- Premium Component Efficiency: The P17 avoids cheap, inefficient configurations. Its boost driver yields excellent thermal management, high efficiency, and completely flicker-free output with zero PWM.
- Clean XHP70.3 HI Beam: The choice of a de-domed CREE XHP70.3 HI emitter results in a uniform 6500K beam profile with significantly less tint-shift across the corona compared to standard domed CREE variants.
- High-Drain 21700 Cell: Powered by an included high-capacity, USB-C rechargeable 5,100mAh 21700 Li-ion battery, striking an ideal form-factor balance between continuous high-drain capability and pocketable mass.
FLASHLIGHT MODES
Runtime & Output Specification
| Mode | Lumen Output | Runtime | Beam Distance | Beam Intensity |
|---|---|---|---|---|
| Turbo | 4900~1250~90 lm | 40s + 1h 55min + 1h | 445 m / 486.7 yards | 49506 cd |
| High | 2200~1250~90 lm | 6min + 1h 50min + 1h | 312 m / 341.2 yards | 24336 cd |
| Medium | 580~90 lm | 5h 30min + 20min | 172 m / 188.1 yards | 7396 cd |
| Low | 90 lm | 1d 12h | 91 m / 99.5 yards | 2070 cd |
| Ultra-Low | 3 lm | 20d | - | - |
| SOS | 2000 lm | 2h 30min | - | - |
| Strobe | 2000 lm | 2h + 47min | - | - |
TECHNICAL SPECIFICATIONS
Performance & Optics
| Peak Intensity | 49506 cd |
| Emitter Type | 1x CREE XHP70.3 HI LED |
| Color Temp / Profile | 6500K Cool White |
| CRI Rating | Max Brightness (~70) |
| Beam Pattern | Hybrid Spot/Flood |
| Moonlight Mode | No |
Power & Electronics
| Battery Size | 1x 21700 Li-ion |
| Included Battery Capacity | 5100 mAh |
| Included Battery Discharge Rating | 15 A |
| Battery Contact Type | Button-top |
| Battery Protection | Protected |
| Standard Battery or Proprietary Battery | Standard |
| Charging Method | USB-C (On-Battery Port) |
| Driver Type | Boost Driver (Step-Up) |
Physical Interface & Build
| Impact Resistance | 1.5m (~5 ft) |
| Water/Dustproof Rating | IP68 (Dustproof and Submersible up to 2m for 30 min.) |
| Switch Location | Dual Tail Switch |
| Switch Type | Forward Clicky, Paddle Switch |
| Instant Strobe | Instant via Tail Function Switch |
| Lockout Mode | Yes |
| Pocket Clip | Two-Way Clip |
| Bezel Style | Crenellated with Glass Breaking Beads |
| Length | 147 mm / 5.8 in |
| Head Diameter | 41 mm / 1.6 in |
| Tube Diameter | 30 mm / 1.2 in |
| Weight (with battery) | 227 g / 8.0 oz |