About this replacement
Cisco Linksys WIP330 — 3.7V Li-Polymer Replacement Battery (7508000705)
This 3.7V 1100mAh Li-Polymer battery replaces the original pack in the Cisco Linksys WIP330 wireless IP phone. It fits both the WIP330 and WIP330 variants and matches the OEM connector and form factor. Capacity is 1100mAh (4.07Wh), sourced to match the original cell specification.
- WIP330 platform fit: Both WIP330 variants share the same battery bay, connector pinout, and 3.7V nominal voltage rail. One battery covers the full WIP330 lineup — no adapter or modification needed.
- Bench tested on actual hardware: We cycled this battery through charge and discharge on the WIP330 platform. The protection circuit responded correctly to full-charge cutoff and low-voltage cutoff without faulting the handset.
- First charge on Li-Polymer handsets: Unlike NiMH cordless packs, this Li-Polymer cell does not need conditioning cycles. Seat the handset in the base immediately after fitting the battery and let it charge to full before the first call — the protection circuit calibrates its state-of-charge tracking on that first cycle.
Talk time shorter than original battery after replacement
A freshly installed Li-Polymer pack often reports less capacity on the first few cycles because the handset's fuel gauge hasn't calibrated to the new cell. The WIP330 tracks charge state internally, and if the battery arrived partially discharged from storage, the first reading will be skewed low. Run one full charge-to-discharge cycle before judging capacity. After that cycle, the reported state-of-charge should align with the rated 1100mAh.
Handset not pairing or registering after battery swap
Removing the battery from a WIP330 clears volatile memory, which can drop the handset's Wi-Fi association and VoIP registration. This is not a battery fault — it happens whenever power is fully removed. After fitting the new battery and charging, re-enter the Wi-Fi credentials and re-register the handset with the SIP server. Confirm the handset shows a valid IP address before testing a call.