SHIMANO DURA-ACE DI2 ST-R9270 Pairing Lost
| CONF | DIAGNOSIS | PART MATCH | ACTION |
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95%
CONF
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CR1632 Lithium Coin Cell
The ST-R9270 shifters utilize dual CR1632 batteries to power the wireless transmitter independently of the main seatpost battery. When these cells reach a critical discharge state, the shifter can no longer maintain the encrypted pairing signal with the rear derailleur gateway. Replacing these cells restores the required voltage for the 2.4GHz radio frequency module to initialize and sustain communication.
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CHECK PRICE
#CommissionsEarned
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5%
CONF
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Secondary Circuit / Wiring Check
Inspect wiring harness.
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CHECK PRICE
#CommissionsEarned
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DIY Repair Guide
Watch exactly how to replace the CR1632 Lithium Coin Cell.