Introduction
The ACEBEAM EC90 is a high-performance Everyday Carry (EDC) flashlight designed for various applications, offering a powerful beam, long range, and robust construction. This manual provides essential information for the safe and effective use of your EC90 flashlight.

Image: The ACEBEAM EC90 flashlight, showcasing its SFT-90X LED, magnetic tail, rechargeable battery, and USB-C charging capabilities, along with its 573-meter beam distance and 4300 lumens output.
What's in the Box
Upon unboxing your ACEBEAM EC90 flashlight, please verify that all the following components are included:
- EC90 Flashlight (Battery Included) x 1
- Holster x 1
- Lanyard x 1
- O-rings x 2 (Spare)
- USB Cable (Type-C) x 1
- User Manual x 1
Features
- High Performance: Utilizes a single SFT-90X LED, delivering up to 4300 lumens and a 573-meter beam distance.
- Magnetic Base: Allows for hands-free operation by attaching to most metal surfaces.
- Rechargeable & Replaceable Battery: Features convenient USB-C charging and a user-replaceable battery for extended runtime.
- Battery Indicator: Integrated indicator provides timely reminders for recharging.
- Durable Construction: IP68 rated for dustproof and waterproof performance, with 1.5m drop resistance.
- Compact Design: Weighs approximately 8.15 oz (231g) for easy portability.
- Two-Way Clip: Offers flexible vertical or horizontal attachment options.

Image: The EC90 flashlight submerged in water, illustrating its IP68 rating, and an image showing it dropped from 1.5 meters, highlighting its impact resistance.
Setup
1. Battery Installation
The EC90 flashlight comes with a battery pre-installed. Before first use, you must remove the insulating film from the battery. Unscrew the tail cap, remove the battery, peel off the protective film, and reinsert the battery with the positive (+) end facing towards the head of the flashlight. Screw the tail cap back on securely.
2. Initial Charging
It is recommended to fully charge the battery before the first use to ensure optimal performance and battery longevity. Refer to the 'Charging' section for detailed instructions.
Operating Instructions
The EC90 flashlight is operated via a single side switch. Familiarize yourself with the following operations:

Image: A diagram illustrating the various operational modes and controls of the EC90 flashlight, including lock/unlock, brightness levels, Ultra Low, Turbo, and Strobe modes.
Power On/Off
- Turn On: Single press the side switch.
- Turn Off: Single press the side switch when the light is on.
Brightness Level Selection
When the flashlight is on, press and hold the side switch to cycle through brightness levels: Ultra-Low → Low → Med1 → Med2 → High. Release the switch to select the desired level. The flashlight will memorize the last used brightness level (except Turbo and Strobe).
Special Modes
- Ultra Low Mode: From OFF, press and hold the side switch for 0.5 seconds to activate Ultra Low mode (5 lumens).
- Turbo Mode: Double press the side switch from any state (ON or OFF) to activate Turbo mode (4300 lumens). Double press again to return to the previous mode.
- Strobe Mode: Triple press the side switch from any state (ON or OFF) to activate Strobe mode (4300 lumens). Single press to turn off.
Lock/Unlock Function
- Lock: From OFF, press and hold the side switch for 3 seconds. The light will flash three times, indicating it is locked.
- Unlock: When locked, press and hold the side switch for 3 seconds. The light will flash three times and enter Ultra Low mode, indicating it is unlocked.
Charging
The EC90 features a convenient USB-C charging port. Ensure the flashlight is turned off before charging.
- Locate the USB-C charging port on the flashlight body.
- Connect the provided USB-C cable to the flashlight and plug the other end into a USB power source (e.g., wall adapter, computer, power bank).
- The indicator light on the switch will show the charging status:
- Red Light: Charging in progress.
- Green Light: Charging complete.
- Once fully charged, disconnect the USB-C cable.

Image: The EC90 flashlight with its USB-C charging port highlighted, showing the indicator light in red for charging and green for fully charged.
Battery Level Indicator
The indicator light on the switch also displays the battery level when the flashlight is in use:
- Blue Light: Battery level > 30%.
- Red Light: Battery level 30% - 10% (low battery warning).
- Red Flash Light: Battery level < 10% (critical battery level).

Image: The EC90 flashlight displaying its battery level indicator, with explanations for blue, red, and flashing red lights corresponding to different charge percentages.
Maintenance
- Cleaning: Clean the flashlight body with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Lubrication: Apply silicone grease to the O-rings periodically to maintain waterproof sealing. Replace O-rings if they appear damaged or worn.
- Battery Care: If the flashlight will not be used for an extended period, remove the battery to prevent leakage. Store the battery in a cool, dry place.
- Threads: Keep the threads of the tail cap clean and lubricated to ensure smooth operation and good electrical contact.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flashlight does not turn on | Battery low or depleted Insulating film not removed Battery inserted incorrectly Loose tail cap Flashlight is locked | Charge the battery Remove insulating film Reinsert battery with positive (+) end towards head Tighten tail cap Unlock the flashlight (press and hold switch for 3s) |
| Light flickers or cuts out | Loose tail cap Dirty contacts Low battery | Tighten tail cap Clean battery and flashlight contacts Charge or replace battery |
| Cannot charge | USB cable not properly connected Faulty USB cable or power source Battery issue | Ensure secure connection Try a different USB cable or power source Replace battery if necessary |
Specifications

Image: A table detailing the technical parameters of the EC90 flashlight, including lumens, runtime, distance, and intensity for various modes (Ultra-Low, Low, Med1, Med2, High, Turbo, Strobe), as well as submersible depth and impact resistance.
| Parameter | Value |
|---|---|
| LED | 1 x SFT-90X LED |
| Maximum Output | 4300 Lumens |
| Maximum Beam Distance | 573 Meters |
| Power Source | Rechargeable Lithium-Ion Battery (Included) |
| Charging Port | USB-C |
| Material | Aluminum |
| Water Resistance | IP68 (Submersible up to 2 meters) |
| Impact Resistance | 1.5 Meters |
| Dimensions (D x W x H) | 1.09" x 1.57" x 5.4" (27.8mm x 40mm x 137.5mm) |
| Weight | 8.15 oz (231g) (including battery) |
Warranty and Support
ACEBEAM offers a 10-year warranty on the EC90 flashlight, covering manufacturing defects and material flaws under normal use. Please retain your proof of purchase for warranty claims.
For technical support, warranty service, or inquiries, please contact ACEBEAM customer service through their official website or the retailer where the product was purchased.





