Do you need a junction box for Di2?
It is possible to build a Di2 system without a Junction B, but this involves running e-Tube wires from Junction A to both the battery and derailleurs, as well as the shifters.
What is the lifespan of a Di2 battery?
A modern Di2 battery will last between 2000 and 5000 kilometers per charge. This depends a bit on how often you shift and also your shifting style. The front derailleur has to work harder than the rear derailleur and therefore also consumes more energy.
Why does my Di2 battery keep going flat?
Battery drain causes Improper setup. Failing cells in the battery. A fault in a firmware-equipped component. A fault in a component without firmware.
Where do I put the Di2 junction box?
The under-stem Di2 junction box (SM-EW90 A/B) is the most common junction box used with Di2 systems. And, it’s most often mounted underneath the stem. It makes for a convenient location to attach shifters or accessories, and it can accept up to 5 connections.
What do the lights on Di2 junction box mean?
When you check your battery level different lights come on depending on the charge levels: Green for two seconds: 100% battery. Blinking green five times: 75% – 50% battery. Red for two seconds: 50% – 25% battery. Blinking red five times: 25% – 0% charge left.
Is Di2 battery waterproof?
Shimano reckon Ultegra Di2 is completely waterproof. They say it’ll be fine even if you’re driving along the motorway in the rain with your bike attached to a rack.
What does red light mean Di2?
A solid red light means about 25 per cent of the battery’s charge left. A flashing red means that it’s almost dead. I suggest charging as soon as you see a flashing red light. A common mistake made when checking battery life is to hold down the wrong button.
What is the Di2 bar end junction box?
Shimano Di2 EW-RS910 Di2 junction box, frame or bar mount. Shimano Di2 bar-plug mount or frame mount charging point provides a simple, neat charging solution for a Di2 bike. Specification. This junction A is required to connect the shifters via E-tube wires to the down tube junction wire.
Why is my ebike charger flashing red?
If the light blinks red in about 90 seconds after battery insertion, then the battery voltage is too low. Leave the batteries in the charger, while the light continues to blink red, for about 24 hours.
Can you wash bike with Di2?
Grab your bike wash of choice and spray it liberally across your entire bike, avoiding your handlebar tape or grips, as well as bearing seals. Although Di2 is waterproof, you should avoid cleaning the components with a pressure washer or pointing any high-pressure stream at them.
How do I charge the Di2?
When you plug one end into the distribution unit of the DI 2 on you bicycle and then a “live” USB cable into the other, a red light appears on the charger. After a bit few seconds light goes out.
What junctions do I need for a Di2 build?
Junctions: There are two junctions needed for completing your Di2 build — A and B. Junction A, SM-EW90, is located at the handlebars and available in both three- and five-port options. The three-port option is intended for standard shifting with a left and right hand shifter.
How does the Shimano Di2 internal battery charger work?
The Shimano Di2 Internal battery charger makes charging your Di2 electronic shifting system a snap. With its indicator lights that tell you when it’s charging and when it’s fully charged, you don’t have to guess.
Where is the junction box on a Shimano mountain bike?
If you have the intention of using Shimano’s satellite sprint shifters, or a combination of time trial shifters and shifter/brake levers, the five-port junction box will be the necessary selection. Depending on your frame specification, Junction B (SM-JC40 or SM-JC41) is located either internally or externally at the bottom bracket area.