Document Overview
TL;DR The FL100 is our EDC flashlight built around a single 14500 lithium or AA alkaline cell, delivering up to 650 lumens peak output with a calibrated five-mode UI and a machined aluminum body weighing 46g without battery. If you carry one light daily, this…
- Document type
- Certification Report
- Prepared by
- Ryan Cooper
- Published
- Last reviewed
- Topics
- Flashlights
TL;DR
The FL100 is our EDC flashlight built around a single 14500 lithium or AA alkaline cell, delivering up to 650 lumens peak output with a calibrated five-mode UI and a machined aluminum body weighing 46g without battery. If you carry one light daily, this is the spec sheet that explains every decision we made.
Optical and Output Engineering: Lumens, Beam, and the LED Choice
The FL100 uses a high-CRI (≥90 CRI) warm-white emitter driven at a carefully controlled current to balance peak output with thermal stability. On a fully charged 14500 cell (3.7V nominal), the FL100 produces:
| Mode | Output (lumens) | Runtime | Beam Distance |
|---|---|---|---|
| Turbo | 650 lm | 45 min | 130 m |
| High | 280 lm | 1 hr 40 min | 85 m |
| Mid | 80 lm | 6 hr | 46 m |
| Low | 15 lm | 28 hr | 20 m |
| Moonlight | 1 lm | 90 hr | — |
These figures are ANSI FL1-standardized measurements: output at 30 seconds from activation, runtime to 10% of initial output, and throw distance at 0.25 lux. We report them this way because the flashlight industry is plagued by peak-at-startup numbers that mean nothing after 60 seconds. Every FL100 batch is spot-checked against an integrating sphere in our Shenzhen QC lab. For context on how ANSI FL1 standardization compares to raw lumen claims in the flashlight market, the FCC device authorization framework and ANSI Standards ANSI/NEMA FL1-2016 are the governing references for portable flashlight performance disclosure.
The throw distance of 130 m at turbo comes from a 25mm TIR optic with a 4° hot spot and 18° spill angle. We chose TIR over a smooth reflector because TIR gives a cleaner, more usable beam pattern for EDC: enough flood to light a room, enough throw to identify something across a parking lot. A pure thrower at this size would produce a pencil beam that’s awkward at two meters.
On AA alkaline, turbo drops to approximately 350 lumens — alkaline internal resistance limits current delivery — but low mode and moonlight perform identically because the current draw is below the point where cell chemistry matters.
Battery Platform: Why We Dual-Supported 14500 and AA
The decision to support both 14500 lithium and AA alkaline in the same body was not a simple engineering choice. It required careful driver design.
Most budget EDC lights that claim “14500/AA compatibility” are really 14500 lights that tolerate AA poorly — the driver runs at voltage ranges optimized for 3.7V, so on 1.5V alkaline you get perhaps two usable modes out of five. We built the FL100’s constant-current driver to operate across a 0.9V–4.2V input range, which means all five modes are accessible on alkaline with appropriate output scaling. The firmware maps turbo to the safe maximum for whichever cell voltage is detected at startup.
From a design standpoint, this dual-cell architecture exists because EDC reliability means nothing if your 14500 runs flat in a hardware store. AA is everywhere. You should never be stuck with a dead flashlight because you couldn’t find a specialty lithium cell. We’ve seen this failure mode countless times in field feedback: users love their 14500 light until the one night it matters and they can’t source a replacement.
The 14500 cell format (14mm diameter × 50mm length) is standardized under IEC Standards IEC 60086 for cylindrical cells. We recommend 14500 cells with a rated capacity of 800–900 mAh from reputable manufacturers; unprotected high-drain cells are compatible with the FL100’s onboard low-voltage protection, which cuts off at 2.8V to prevent deep discharge damage.
The FL100 charges via USB-C at 5V/1A when a 14500 cell is installed. Charge time from empty to full is approximately 90 minutes. AA alkaline cells should not be charged in the FL100 — the firmware disables charging if it detects a cell voltage below 2.5V at startup, which is the threshold distinguishing a depleted alkaline from a lithium cell in recovery.
Body Design: Machined Aluminum, Pocket Clip, and Grip Geometry
The FL100 body is CNC-machined from 6061-T6 aluminum with a type-II anodize finish. Fully assembled weight is 46g with a 14500 cell installed, or 48g with AA. Length is 97mm; head diameter is 23mm; grip diameter is 18mm.
We chose 6061-T6 over the cheaper 6063 alloy used in many budget lights because 6061 has higher tensile strength (310 MPa vs 186 MPa) and better thermal conductivity for heat-sinking the emitter during turbo operation. Sustained turbo output would cook the LED junction in a low-conductivity aluminum body at this head diameter. Thermal runaway in small EDC lights is real — during our thermal cycling tests at 40°C ambient with sustained turbo operation, we measured LED junction temperatures peaking at 88°C before the FL100’s step-down firmware kicked in at 60 seconds and reduced drive current. This is intentional: the step-down protects both the emitter and the anodize finish.
The pocket clip is spring-steel, rated for at least 2,000 attachment/detachment cycles in our fatigue testing. It sits bead-up (pocket-clip facing up) by design. We chose bead-up carry because it allows one-handed deployment without re-gripping: thumb and forefinger on the clip removes the light tail-down, which is the natural grip for a tail-switch light. This sounds minor until you carry the light daily for six months. Clip orientation is the kind of decision that separates a tool designed by people who carry flashlights from one designed on a spreadsheet.
The tail-cap switch is a forward clicky with 600g activation force — firm enough to prevent accidental activation in a packed pocket or bag, light enough for reliable single-handed operation with winter gloves. IP rating is IPX7: we tested submersion at 1 meter for 30 minutes with no water ingress in 20 consecutive units, verified by internal moisture indicator strips.
User Interface: Five Modes, Memory, and Lockout
The FL100 UI follows a single-switch architecture: one physical tail switch controls all functions. We programmed it to work intuitively without a manual:
- Single click: On/off (returns to last memorized mode)
- Half-press: Cycle through modes (Moonlight → Low → Mid → High → Turbo → back)
- Double-click from off: Direct access to Turbo
- Three clicks from off: Lockout mode (prevents accidental activation)
- Three clicks from lockout: Unlock
Mode memory is stored in non-volatile memory and persists through battery swaps. We specifically excluded muggle-mode (a simplified one- or two-mode lockdown some manufacturers impose) because FL100 users are selecting this light based on its full capability — a hidden simplified mode creates confusion and support tickets, not safety.
A common question from B2B buyers and OEM partners: can the UI be customized for different markets or use cases? Yes. We can reflash the driver firmware for volume orders to adjust step-down timing, ramp behavior, or mode selection. Contact us via the link at the bottom of this article.
Competitive Context: Where FL100 Sits Against Convoy and Wurkkos Tier
The “budget EDC” flashlight market is genuinely competitive at the $25–$45 price point. Convoy, Wurkkos, Sofirn, and similar brands offer technically capable lights with active enthusiast communities. We’re not dismissive of them — several of their emitter and driver combinations are used as benchmarks in our own development process.
The differentiation case for the FL100 comes down to four areas:
| Feature | FL100 | Typical Convoy S2+ | Typical Wurkkos TS10 |
|---|---|---|---|
| Driver input range | 0.9V–4.2V (AA+14500) | 3.0V–4.2V (14500 only) | 3.0V–4.2V (14500 only) |
| Onboard USB-C charging | Yes (5V/1A) | No (requires external charger) | Yes |
| Pocket clip orientation | Bead-up (tail-forward) | Bead-down (head-forward) | Bead-down |
| Anodize grade | Type-II, mil-spec hardness | Type-II standard | Type-II standard |
| IPX rating | IPX7 (tested, certified) | IPX4 (splash resistant) | IPX7 |
| Certification | CE, FCC, RoHS | None listed | None listed |
The Convoy S2+ remains one of the most popular EDC hosts globally because it’s infinitely customizable — swappable emitters, driver upgrades, aftermarket switches. That’s its identity. The FL100 is not that. The FL100 is a finished, certified, tested product that works out of the box for users who want reliability over tinkering.
For professionals and fleet buyers, the CE marking and RoHS compliance documentation that accompanies FL100 shipments is not optional — it’s required for EU market distribution and for corporate procurement processes that mandate hazardous material declarations. DIY-community lights typically don’t ship with declaration of conformity documentation.
If you’re comparing portability-to-output tradeoffs across our lighting lineup, the LED Lumen Output vs Runtime: Engineering the Tradeoff in Portable Camping Lanterns article covers the thermal and driver tradeoffs that apply equally to compact flashlights.
Maintenance & Best Practices
The FL100 requires minimal maintenance, but a few practices extend its service life significantly.
O-ring care: The head and tail O-rings provide IPX7 sealing. Every six months, or after any submersion, remove the head and inspect the O-ring for flattening or cracking. Apply a thin coat of silicone grease — not petroleum-based lubricants, which degrade nitrile rubber. Replacement O-rings (size 14mm × 1.5mm cross-section) are available from us or any hardware supplier.
Contact cleaning: Battery contacts oxidize over time, especially with alkaline cells that can leak potassium hydroxide electrolyte. If you notice reduced output or intermittent behavior, clean the spring contacts and body tube contacts with a cotton swab and isopropyl alcohol (90%+). Never use abrasive materials on the contacts.
Cell storage: If storing the FL100 for more than 30 days, remove the cell. Alkaline cells left in flashlights are the #1 cause of corrosion damage we see in returned units. A 14500 lithium cell can be stored in the light at partial charge (40–60%) for shorter periods, but we still recommend removal for extended storage.
Thermal management: After sustained turbo operation (the step-down activates at 60 seconds), allow 2–3 minutes of cooling at mid or low mode before running turbo again. Continuous thermal cycling at maximum output reduces LED lifespan, even with the firmware protection active.
For comparison on how similar maintenance principles apply to our cordless inflation tools, see How to Maintain Your Cordless Tire Inflator for Maximum Lifespan.
Frequently Asked Questions
Q1: What is the FL100’s maximum output on a standard AA alkaline battery?
A: Approximately 350 lumens on turbo with a fresh AA alkaline at 1.5V. Internal resistance in alkaline chemistry limits peak current delivery compared to 14500 lithium, which delivers the full 650 lm. All other modes — Mid, Low, and Moonlight — are within 10% of rated output regardless of cell type.
Q2: How does the FL100 compare to the Convoy S2+ for daily carry?
A: The S2+ is a customization platform; the FL100 is a finished EDC tool. The practical differences for daily carry are onboard USB-C charging (FL100 has it, S2+ does not), true AA compatibility via a wide-input driver, CE/RoHS certification for regulated market compliance, and bead-up clip orientation for one-handed deployment. If you want to swap emitters and tune your own firmware, the S2+ ecosystem is mature and well-supported. If you want a certified, ready-to-carry light, the FL100 is the answer.
Q3: Can I use unprotected 14500 cells in the FL100?
A: Yes. The FL100 has onboard low-voltage cutoff at 2.8V, which protects unprotected cells from deep discharge. We recommend high-drain-rated 14500 cells with ≥800 mAh capacity. Avoid counterfeit cells with inflated capacity claims — a genuine 14500 cell won’t exceed 1,000 mAh at this form factor; anything claiming 2,000+ mAh is a mislabeled or unsafe product.
Q4: Is the FL100 CE and RoHS certified, and what does that mean for EU buyers?
A: Yes. The FL100 carries CE marking and RoHS compliance documentation, both of which are required for legal sale in the European Economic Area. CE confirms the product meets EU safety, health, and environmental protection requirements. RoHS certifies that restricted hazardous substances (including lead, mercury, and cadmium) are below threshold limits. Full DoC documentation is available to distributors and OEM partners on request.
Q5: Does the FL100 have PWM flicker, and does it matter for everyday use?
A: The FL100 uses DC-fix (constant current) regulation on Mid, Low, and Moonlight modes — no PWM flicker at those levels. Turbo and High use a high-frequency PWM above 25 kHz, which is above the threshold detectable by any standard camera or human eye under normal conditions. For users with specific photosensitivity concerns, Mid mode at 80 lumens is the recommended daily-use setting and is fully flicker-free. Accuracy in how we communicate this matters more than a blanket “no PWM” marketing claim that technically covers only some modes.
Published by ETENWOLF Technical Team | Request a quote