Shimano Deore XT RD-M8250-SGS Di2 rear derailleur, 12-speed

WARNING
For information about installing, adjusting, and replacing products that are not found in the user's manual, consult the place of purchase or a distributor. A dealer's manual for professional and experienced bicycle mechanics is available on our website (https://si.shimano.com).
For safety, be sure to read this "user's manual" thoroughly before use, follow it for correct use, and save it so that you can refer back to it at any time.
The following instructions should always be followed in order to prevent personal injury, physical damage to equipment and the surrounding area. The instructions are classified according to the degree of danger or damage that may occur if the product is used incorrectly.
DANGER - Failure to follow the instructions will result in death or serious injury.
WARNING - Failure to follow the instructions could result in death or serious injury.
CAUTION - Failure to follow the instructions could result in personal injury or physical damage to equipment and the surrounding area.

For items requiring replacement, contact the place of purchase or a distributor.
Be sure to follow the instructions below to prevent burns and other injuries due to leakage, overheating, fire or explosion.

DANGER
- Use the specified charging cable when charging the battery. Using any other items may result in fire, overheating, leakage, or damage to the connected PC.
- Prevent the charging cable from getting wet and do not touch or hold it when it is wet or when your hands are wet. Failure to do so may result in operational problems or electric shock.
- Use an AC adapter with a USB port with a voltage of 5.0 V DC and a current of at least 1.0 A DC. If you use an adapter with a current value of less than 1.0 A, the AC adapter may heat up and cause fire, smoke, overheating, damage, electric shock or burns.
- Do not heat the battery or expose it to fire. Failure to do so may cause the battery to burn or burst.
- Do not use or leave the battery in hot or humid places where the battery may be exposed to direct sunlight, in a closed vehicle on a hot day, or near a heater. Failure to do so may result in leakage, overheating or bursting, resulting in fire, burns or other injuries.
- Do not deform, modify or disassemble the battery. Also, do not apply solder directly to the battery terminals. Failure to do so may result in leakage, overheating or bursting, resulting in fire, burns or other injuries.
- Do not touch the metal terminals with metal objects such as hairpins. Failure to do so may result in short circuits, overheating, burns or other injuries.

WARNING
- Do not disassemble or modify the product. This may cause the product to malfunction, you may fall unexpectedly and be seriously injured.
- Always grasp the cable plug when connecting or disconnecting the USB cable or charging cable. Failure to do so may result in fire or electric shock.
- If the following symptoms occur, stop using the device and contact the place of purchase. Fire or electric shock may occur.
- If pungent-smelling smoke comes out of the power plug or the plug heats up. There may be a bad connection inside the power plug.
- If there is thunder during charging with an AC adapter with a USB port, do not touch the device, bicycle or AC adapter. Lightning strikes can cause electric shock.
- Do not use a USB hub to connect the cable to the PC's USB port. Charging failure or fire due to overheating may occur.
- Be careful not to damage the charging cable. Do not damage it, modify it, bend it forcibly, twist or stretch it, place it near hot objects, place heavy objects on it, or tie it tightly together. If used in a damaged condition, fire, electric shock or short circuit may occur.
- If the battery is not fully charged after 4 hours of charging, stop charging. Failure to do so may result in fire, bursting, ignition or overheating.
- Do not immerse the product in fresh or salt water and prevent the terminals from getting wet. Failure to do so may result in fire, bursting, ignition or overheating.
- Do not subject the product to strong impact or throw it. Failure to do so may result in bursting, overheating or operational problems.
- Do not use the battery if it shows signs of leakage, discoloration, deformation or other unusual signs. Failure to do so may result in bursting, overheating or operational problems.
- Clean the chain and QUICK-LINK regularly with a suitable chain cleaner. Maintenance intervals depend on usage and riding conditions. Never use alkaline or acid-based solvents, such as rust removers. If such a solvent is used, the chain or QUICK-LINK may break and cause serious injury.
- Check the chain for damage (deformation or cracking), skipping or any other irregularities, such as spontaneous shifting. If any problems occur, contact the place of purchase or a distributor. The chain may break and you may fall.

CAUTION
- Store in a safe place out of the reach of small children to prevent accidental ingestion.
- Prevent grease from adhering to the metal terminals. This may cause conduction failure.
- Do not leave the charging cable connected during maintenance.