built-in light seatpost
S311
S311 is a bicycle seatpost with an integrated rear-light (with 5 LEDs). There are 3 types of S311: S311, S311E, S311D. The power source of S311 is an integrated rechargeable battery, the battery can be charged via a micro-USB port. S311E is connected to an external power source via a connection cable, for example to the battery of an e-bike. S311D is powered by a dynamo hub.
Seatpost test standard | ISO 4210 mountain or ISO City |
LED-unit | There are 2 modes to choose from: – 5 LED mode (all 5 LEDs light up) – 3 LED mode / energy saving mode (only the top 3 LEDs light up) |
Function | The second top LED functions as a button and is used to operate the real light. Light modes: Off → 5 LEDs → 3 LEDs → Long press to witch off |
Power source | Lithium polymer battery 3.7V, 800mAh type: 801473, with integrated overcharge protection |
Light duration (fully charged battery) |
5 LED: 10 hours 3 LED: 15 hours |
Charging | Micro-USB 2.0 port integrated in the seat rail clamp with a transparent silicone cover for splash-water protection. Charging voltage: 5 V Charging current: 0.5 A – 2.0 A |
Charging time | 2.5 hours |
Charge state | Indicated by a blue LED integrated into the micro-USB port. As soon as this LED lights up, the battery still has enough capacity to power the LEDs for 1 more hour in accordance with the regulation. The micro-USB port is covered with a transparent silicone cap so that the blue LED is visible. |
Package contents | Rear light seatpost, USB charge cable (200cm) |
Approval code | K1595 |
Seatpost test standard |
ISO 4210 mountain or ISO City |
Function |
Lights up when AC power is supplied |
Power source |
Dynamo AC |
Power consumption |
0.5W |
Nominal voltage |
AC 6V (3W) |
Package Contents |
Rear light Seapost, extension cable (200mm) |
Seatpost test standard | EN 15194 or ISO 4210 mountain |
Function |
The Rear light is operated by the light switch of the e-bike system. The Rear light does not have modes. |
Power source | On-board battery of the e-bike. The Seatpost can be operated with on-board voltages (direct current – DC) from 6 V to a maximum of 12V. The electrical connection is made with different cables and connectors in compliance with the relevant regulations. |
Power consumption | 0.3W |
Nominal voltage | DC 6V (6 V – 12V) |
Package Contents | Rear light seatpost |
Special seatpost design of S311
Patented seatpost with an integrated seat rail clamp. The seatpost tube features 5 holes in which the LEDs are enclosed.
![](https://www.lightskin.co.kr/wp-content/uploads/2023/03/det_022.jpg)
S311’s USB 2.0 charging port is in the lower section of the seat rail clamp. The port is accessible from the outside and can be closed using a transparent silicone cover.
![](https://www.lightskin.co.kr/wp-content/uploads/2023/03/det_021.jpg)
S311E or S311D’s cable with a connector extends out of the lower end of the seatpost tube for connection to the electrical system of the e-bike or the bicycle dynamo.
![](https://www.lightskin.co.kr/wp-content/uploads/2023/03/det_020.jpg)
Features
Diameter (see drawing) | 25.4㎜ / 27.2㎜ / 30.9㎜ / 31.6㎜ |
Widths (see drawing) | 350㎜ / 400㎜ (D30.9mm / D31.6mm) |
Color and surface finish | polished Silver / anodized Black. |
Material | Aluminum 6061 T6 |
LED unit
5 LEDs with integrated electrical light control and battery management system. The two upper LEDs are protruding, also ensuring the lateral emission of light. The lower 3 LEDs are sunk into the seat post tube. The LEDs, circuit board and battery are enclosed in a plastic housing and are thus protected. (dust and splash proof in accordance with IPX5).
Operating temperature | Min.: -15°C, Max.: 45°C Optimum storage temperature: 20-25° C |
Compliant with standard or directive | RoHS, UN3481, StVZO §22a TA 14b (Bicycle rear light), IPX5 |
Assembly
Angle limits (frame seat tube) according to the StVZO |
Min: 70.0° |