1. Уводзіны
This manual provides essential information for the safe and effective use of your DARKBEAM T25 Bike Tail Light. Please read these instructions thoroughly before operation and retain for future reference.
The DARKBEAM T25 is a compact, high-visibility bicycle taillight designed to enhance rider safety during night riding and low-light conditions. It features an LED display for battery status, multiple lighting modes, intelligent braking detection, and a durable, waterproof design.
2. Інфармацыя па бяспецы
- Always ensure the taillight is securely mounted and fully charged before each ride.
- Не глядзіце непасрэдна ў прамень святла, каб пазбегнуць часовага пагаршэння зроку.
- Clean the light regularly to maintain optimal visibility. Use a soft, damp тканіна.
- Operating the bicycle taillight does not replace the need for other safety measures, such as wearing reflective clothing or using additional lighting.
- Adhere to all local traffic laws and regulations regarding bicycle lighting.
3. Змесціва ўпакоўкі
Праверце, ці ёсць усе прадметы ў вашай упакоўцы:
- DARKBEAM T25 Bike Tail Light (battery included)
- Mount x 2 (1 Seat bow, 1 Seat tube)
- Tie strap (for fixing the seat bow) x 3
- Зарадны кабель USB-C х 1
- Кіраўніцтва карыстальніка x 1
4. Прадукт скончыўсяview
The DARKBEAM T25 features a compact design with an integrated LED display and a single control button.

Figure 1: DARKBEAM T25 Bike Tail Light showing the LED display and USB-C port.
Асноўныя характарыстыкі:
- Экран святлодыёднага дысплея: Shows real-time battery level.
- USB-C акумулятарная: Зручная і хуткая зарадка.
- 6 рэжымаў асвятлення: Various options for visibility.
- Воданепранікальнасць IP55: Designed for use in various weather conditions.
- Intelligent Braking: Automatically increases brightness upon deceleration.
- Аўтаматычны рэжым сну/абуджэння: Conserves battery by entering sleep mode after 30 seconds of inactivity and waking upon vibration.
5. Усталёўка і налада
The DARKBEAM T25 offers versatile mounting options to suit your bicycle setup.

Figure 2: Two primary mounting styles: saddle rail and seat post.
5.1. Seat Post Mounting
- Select the appropriate position on your seat post.
- Wrap the silicone strap of the seat post mount around the seat post.
- Hook the strap securely into one of the slots on the mount.
- Insert the taillight into the mount at a 45-degree angle and rotate it 45 degrees to the left or right until it clicks into place.
5.2. Saddle Rail Mounting
- Secure the saddle rail mount to the saddle rails using the provided zip ties. Ensure it is tight and stable.
- Insert the taillight into the mount at a 45-degree angle and rotate it 45 degrees to the left or right until it clicks into place.
Video 1: Demonstration of DARKBEAM Bike Tail Light installation and features.
6. Інструкцыя па эксплуатацыі
6.1. Уключэнне/выключэнне харчавання
- To turn on: Press and hold the power button (located on the side) for approximately 2 seconds.
- To turn off: Press and hold the power button for approximately 2 seconds.
6.2. Changing Lighting Modes
Once the light is on, short press the power button to cycle through the 6 available lighting modes:
- Stay On (Constant Light Mode)
- Rapid Flash Mode
- Breathing Flash Mode
- Рэжым ўспышкі
- Рэжым мігцення
- Single Flash Mode
The light features a mode memory function, meaning it will restart in the last used mode when turned on again.

Figure 3: Visual representation of the 6 available lighting modes.
6.3. Intelligent Braking and Sleep Function
- Датчыкі тармажэння: In normal mode, the taillight automatically detects rapid deceleration (braking) and increases its brightness to alert vehicles behind you.
- Аўтаматычны сон: If the taillight remains stationary for 30 seconds after being turned on, it will enter a sleep mode to conserve battery.
- Аўтаматычнае абуджэнне: The light will automatically wake up from sleep mode upon detecting vibration (movement).

Figure 4: Brake sensor in action, increasing brightness when deceleration is detected.
6.4. Інструкцыі па зарадцы
The DARKBEAM T25 is equipped with a USB-C charging port.
- Locate the USB-C port on the side of the taillight, protected by a waterproof cover.
- Gently open the waterproof cover.
- Connect the provided USB-C cable to the taillight and the other end to any standard USB power source (e.g., power bank, laptop, USB adapter). Ensure the power supply voltage does not exceed 5V 2A.
- The LED display will indicate charging status.
- Час зарадкі складае прыкладна 2.5 гадзіны.
- Once fully charged, disconnect the cable and securely close the waterproof cover to maintain IP55 water resistance.

Figure 5: USB-C fast charging with various compatible devices.
7. Тэхнічнае абслугоўванне
7.1. Уборка
To clean the taillight, wipe it with a soft, damp cloth. Do not use abrasive cleaners or solvents, as these may damage the device.
7.2. Захоўванне
When not in use for extended periods, store the taillight in a cool, dry place. It is recommended to charge the battery every 3-6 months to prolong its lifespan.
7.3. Воданепранікальнасць
The DARKBEAM T25 has an IP55 water resistance rating, meaning it is protected against dust ingress and low-pressure water jets from any direction. Ensure the USB-C port cover is always securely closed to maintain water resistance.

Figure 6: The taillight is designed to withstand rain and splashes.
8. Выпраўленне непаладак
- Не гарыць святло: Пераканайцеся, што акумулятар зараджаны. Націсніце і ўтрымлівайце кнопку харчавання на працягу 2 секунд.
- Святло не зараджаецца: Праверце кабель USB-C і падключэнне крыніцы сілкавання. Пераканайцеся, што порт зарадкі чысты і без смецця.
- Light not responding to movement (Auto Wake): Ensure the light is not in sleep mode. If it is, simply move the bike to activate it.
- Light falling off mount: Re-check installation steps to ensure the mount is securely fastened and the light is properly clicked into the mount.
9. Тэхнічныя характарыстыкі
| Асаблівасць | Спецыфікацыя |
|---|---|
| Назва мадэлі | Т25 |
| Марка | ЦЕМНЫ ПРАМЕНЬ |
| Матэрыял | Пластыкавыя |
| Вага прадмета | 24 грам |
| Памеры прадмета (ДxШxВ) | 1.26 х 1.18 х 1.26 цалі |
| Крыніца харчавання | Працуе ад батарэі (акумулятар USB-C) |
| Яркасць | 500 люмен (макс.) |
| Колькасць налад | 6 рэжыму асвятлення |
| Узровень воданепранікальнасці | Воданепранікальны IP55 |
10. Гарантыя і падтрымка
The DARKBEAM T25 Bike Tail Light comes with a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims, technical support, or any questions regarding your product, please contact DARKBEAM customer service through the retailer where the product was purchased.