Description
🔋 Set of 4 Cisco Batteries GP-S10-374192-010H / 35-100138-03 for Cisco 8821 Wireless IP Phone — Li-Ion 3.8V 2000mAh ✅
Reliable original power supply for your Cisco 8800 Series fleet • Used Tested
📦 You are purchasing a set of 4 original Cisco batteries reference GP-S10-374192-010H / 35-100138-03 (also known under references CP-BATT-8821 and 74-102376-01), designed for the Cisco 8821 Wireless IP Phone and the 8800 series. These rechargeable Li-Ion batteries ensure reliable talk time, long standby duration, and perfect compatibility with Cisco enterprise telephony infrastructure.
⚙️ Technical Specifications
35-100138-03
74-102376-01
📱 Cisco 8800 Series Compatibility
These IP Phone batteries are directly compatible with the following models:
⚠️ Warning: Not compatible with the dedicated Cisco CP-8821 Wireless IP Phone model.
🔍 Product Condition
🛠️ Used — Tested and Functional
These batteries are used, sourced from professional stock clearance. Each unit has been individually tested to verify its charge capacity and proper electrical function. Minor cosmetic wear may be present, consistent with prior use in a business environment.
📸 Important Note: Photos are for illustration purposes only. Only the textual content of the listing is authoritative for the exact product reference and included accessories. If in doubt, please contact us before purchasing.
🌟 Our Commitments
| ✅ 30-Day Return Guarantee — Refund or exchange at no cost |
| 🚚 Secure and Fast Shipping with carrier tracking number provided upon dispatch |
| 🧾 Professional Invoice with 0% VAT in paper format included in every package |
| 🏢 Professional Seller specializing in business telephony and IT equipment |
⚠️ Software Disclaimer: We do not provide any technical support. Compatibility with your network infrastructure, VoIP settings configuration, Cisco firmware versions, or software licenses are the sole responsibility of the buyer. We recommend verifying compatibility with your network administrator before purchase.
❓ Frequently Asked Questions
❓ Is the GP-S10-374192-010H part really compatible with my Cisco 8821?
Yes, GP-S10-374192-010H and 35-100138-03 are the original Cisco (OEM) part numbers for the IP Phone 8821 and the entire 8800 range. These references are directly interchangeable with CP-BATT-8821 and 74-102376-01. No special configuration is needed: just insert the replacement battery into the compartment.
❓ What is the real battery life of these Cisco 8800 Series Li-Ion batteries?
In standard professional use, these 3.8V 2000mAh batteries provide up to 13 hours of talk time and up to 240 hours on standby. Actual battery life may vary depending on Wi-Fi coverage, Bluetooth activation, and IP phone usage intensity.
❓ Have these used Cisco IP phone batteries been tested before shipping?
Yes, each battery in this set has been individually tested to verify its charge capacity and functionality. The set also benefits from our 30-day return guarantee: if any item is defective upon receipt, we will exchange it or provide a full refund without discussion.
❓ How do I replace the battery in a Cisco 8821 or 8851 IP phone?
Replacement is simple and requires no tools: turn off your IP phone, remove the back cover, carefully remove the old Li-Ion battery, insert the new one aligning the connector until it clicks, then close the cover. Perform a first full charge (~3 hours) to calibrate the level indicator and maximize battery life.
❓ Will I receive an invoice for my company or public administration accounting?
Absolutely. A professional invoice with 0% VAT (applicable to used equipment sales) in paper format is systematically included with every shipped package. This document is valid for your accounting, purchases in SMEs, mid-sized companies, local authorities, or public administration.
❓ Can I buy this set to replace the batteries in a Cisco 8800 phone fleet?
Yes, this set of 4 batteries is perfect for managing a corporate phone fleet. If you need a larger quantity to renew your Cisco wireless IP phone fleet (8811, 8841, 8845, 8851, 8861, 8865), feel free to contact us via eBay messaging for a quote tailored to your volume.
📦 Fast & Secure Shipping with Tracking Number
✅ 30-Day Return Guarantee • 🧾 Professional Invoice with 0% VAT Included • 🏢 Professional eBay Seller