Avaya B169 7.4V 6800mAh Replacement Battery 700508893

Avaya B169 Wireless SIP Conference Phone — 7.4V Li-ion Replacement Battery (700508893)

This 7.4V, 6800mAh lithium-ion battery replaces the original pack in the Avaya B169 Wireless SIP Conference Phone. It restores talk time and standby capacity when the factory battery degrades. The OEM part number is 700508893.

• B169 platform fit: The B169 uses a 7.4V two-cell Li-ion pack with a BMS handshake that governs charge acceptance and protection thresholds. This replacement matches that voltage rail and connector, so the dock and handset firmware communicate with the pack the same way they do with the original.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on B169-compatible test equipment. The BMS tripped protection at the correct low-voltage threshold and accepted a full charge cycle without thermal flags or fault codes.
• First-session calibration: After installing a new pack, run one full charge cycle before the first meeting. The B169 maps battery state against voltage thresholds during normal operation, and the indicator may show inaccurate warnings until the system has observed a complete charge-discharge curve.

Voltage sag under combined audio and wireless draw mid-meeting

The B169 runs audio processing and its wireless radio simultaneously during a conference session. That combined draw creates a higher sustained current pull than standby or idle operation. A degraded or deeply discharged pack cannot hold voltage under that load, and the unit may drop its wireless link or restart to protect itself. A fresh pack at full charge maintains the voltage headroom the radio needs to stay connected through a full session.

Charging dock not registering the battery after a swap

If the dock shows no charge activity after fitting a new pack, the most common cause is contact resistance between the pack terminals and the dock's charge pins. Oils from handling or residue on the contacts interrupt the low-current signal the dock uses to detect the pack. Wipe the gold contacts on both the battery and the dock with a dry lint-free cloth, then reseat the unit firmly. The dock should begin charging within 30 seconds of proper contact.