Cisco IP Phones & Accessories CP-BATT-7925G-EXT

Description of the Cisco CP-BATT-7925G-EXT Battery

• The CP‑BATT‑7925G‑EXT is the extended‑life lithium‑ion battery made for Cisco’s Unified Wireless IP Phone 7925G series (also works with 7925G‑EX and 7926G). “EXT” stands for “Extended” life as opposed to the standard battery model (CP‑BATT‑7925G‑STD). This IP phone supports wireless technology standards (WI-FI) and features a color LCD display, a built-in speakerphone, and a headphone interface. With the standard battery, the IP phone can operate without recharging for 180 hours (standby) and up to 9.5 hours (talk time). With the CP-BATT-7925G-EXT extended-life battery, the phone can operate for 240 hours (standby) and 13 hours (talk time). Charging time with a dedicated charger is approximately 3 hours. When connected to a computer or laptop (USB port), the device will charge for 7 hours. This model has standard dimensions of 8 x 15 x 5 cm and weighs approximately 100 grams. Its carefully designed construction, along with the use of high-quality materials and components, ensures a long service life when used correctly.

Battery features:

• Uses the highest quality graded and sorted ‘A’ Grade cells.
• Has resistance welded gold plated contacts for maximum performance.
• Provides excellent discharge characteristics.
• Uses high impact ABS and Polycarbonate plastic housings for ruggedness.
• Undergone comprehensive testing including high altitude performance, vibration, mechanical shock, thermal cycling, external short circuit and overcharge test simulations.
• Extended Capacity: The battery is a Li‑ion (lithium‑ion) type with ≈ 1500 mAh capacity.
• Higher Talk Times: The extended battery gives up to ~13 hours of continuous talk time, compared to about 9.5 hours with the standard battery. 
• Enhanced Standby Time: In standby (idle) mode, the extended battery lasts up to ~240 hours, versus ~180 hours for the standard battery.
• Compatibility: Works with Cisco Unified Wireless IP Phone 7925G, and also with 7925G‑EX and 7926G models.
• OEM / Fully Compatible: It is fully compatible with Cisco’s original part number 74‑5469‑01 (the OEM “extended battery” version). It’s designed so it works seamlessly with firmware, charging circuits, etc., avoiding issues that sometimes occur with non‑certified replacements.
• Better for Heavy Use: If the phone is used frequently (many calls per day, or long durations), or remains powered on and connected for long periods without calls, the extended battery reduces how often you must recharge or replace batteries. This is useful in environments like healthcare, warehouses, field work, etc. (implicitly from longer talk/standby times)
• Better Power Management Support: The phones (with the extended battery) can more efficiently take advantage of power‑saving features (such as PS‑POLL, U‑APSD, proxy ARP under Cisco Client Extensions, etc.), which helps maximize standby life. So the benefit of the extended battery is amplified when the wireless network and access points support these features
• Reduced Operational Downtime: Because recharging is less frequent, users experience fewer interruptions; maintenance or battery swaps are less often required. This is important for mission‑critical or always‑on deployment scenarios (e.g. staff carrying the phone, roaming, etc.). This is an implied advantage from the longer times.
• Warranty: Many vendors offer a one year warranty on this battery.

What To Watch Out For / Practical Notes

• Actual battery life depends heavily on usage: how often you talk, use WiFi, the signal strength, background processes, Bluetooth, environmental conditions, etc. The “up to” numbers are under ideal or light‑use conditions.
• Because the extended battery is larger capacity, it may be slightly bulkier or heavier than the standard battery. (Some sources mention “extended length battery” for the models, which implies a physical difference)
• Charging times will depend on the charger used and how depleted the battery is. Using the specified Cisco or approved charger is best.