{"title":"VoIP Phone","description":"\u003cp\u003eStay connected with clear, uninterrupted communication using our VoIP Phone battery collection, designed for reliable performance in modern internet-based calling systems. Whether used in offices, call centers, remote work setups, or business communication networks, our replacement batteries ensure your VoIP phones remain powered throughout the workday.\u003c\/p\u003e\n\u003cp\u003eOur collection includes high-quality rechargeable batteries compatible with a wide range of VoIP desk phones and wireless IP communication devices. Built for stable energy output and long operating life, these batteries help maintain consistent call quality, device responsiveness, and uninterrupted connectivity during important conversations.\u003c\/p\u003e\n\u003cp\u003eWe offer dependable Lithium-Ion and Ni-MH battery options selected for durability, safety, and efficient charging cycles. Each battery is designed to support the demands of professional communication environments where downtime is not an option.\u003c\/p\u003e\n\u003cp\u003eWhether you are replacing an aging battery or upgrading for improved performance, our VoIP Phone battery collection provides trusted solutions for business and personal use. Stay productive, connected, and efficient with reliable backup power for your communication devices.\u003c\/p\u003e\n\u003cp\u003eShop our VoIP Phone battery collection for competitive pricing, fast shipping, and dependable quality you can trust.\u003cbr\u003e\u003c\/p\u003e","products":[{"product_id":"unidata-icw-1000g-replacement-battery-37v-1100mah-li-ion","title":"UniData ICW-1000G VoIP Phone Compatible Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUniData ICW-1000G \/ WPU-7800 — 3.7V Li-ion Replacement Battery (ICW-1000G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion battery for the UniData ICW-1000G cordless VoIP handset and WPU-7800. It powers the wireless handset so calls stay connected within range of the base station. When the original cell can no longer hold a charge, this replacement restores full handset operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eICW-1000G and WPU-7800 compatibility:\u003c\/strong\u003e\n    Both handsets share the same 3.7V single-cell Li-ion pack with identical connector pinout and physical footprint — 53.26 × 34.10 × 6.10mm. The BMS parameters match what the base station charger circuit expects, so the charging handshake completes normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the ICW-1000G platform. The BMS held the charge curve within spec and terminated correctly at full capacity without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use charge protocol for VoIP backup function:\u003c\/strong\u003e\n    After installing, power cycle the handset and place it on the base for a full 4-hour charge before testing any backup or outage function. The phone's firmware will not activate backup power from a partially charged cell — it checks for a minimum state of charge before committing the battery to emergency use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eICW-1000G handset not switching to battery during a power outage\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ICW-1000G base station monitors battery state of charge before it will route power through the backup circuit. If the replacement cell arrived partially discharged from storage — common with Li-ion below 3.5V — the firmware flags it as insufficient and keeps the phone off during an outage test. This is not a fault with the battery or the handset. Place the handset on the cradle for a full 4-hour charge, then retest. The backup circuit will engage once the cell reads above the firmware's minimum threshold, typically around 3.6V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning appearing immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells lose charge during storage and shipping, so a voltage of 3.4–3.5V on arrival is normal. The ICW-1000G handset reads this as a low-battery state and displays the warning right away — it is not a sign of a defective battery. Return the handset to the base station and allow it to charge uninterrupted. The warning clears once the cell climbs above approximately 3.7V, which the base charger reaches within the first hour of charging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428090511450,"sku":"BWCS-UDG100SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428090544218,"sku":"BWCS-UDG100SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428090576986,"sku":"BWCS-UDG100SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UDG100SL-1.webp?v=1779934037"},{"product_id":"incom-icw-1000g-replacement-battery-37v-1100mah-li-ion","title":"Incom ICW-1000G Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIncom ICW-1000G — 3.7V Li-ion Replacement Battery (KAL523450AR)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1100mAh Li-ion cell replaces the KAL523450AR battery in the Incom ICW-1000G cordless VoIP phone. It restores the phone's ability to operate untethered and to maintain backup power during outages. Voltage and physical dimensions match the original: 53.26 x 34.10 x 6.10mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eICW-1000G platform fit:\u003c\/strong\u003e\n    The ICW-1000G uses a single-cell 3.7V Li-ion pack with a specific connector orientation and BMS handshake tied to the phone's charge management circuit. This cell matches that connector and voltage rail so the phone's firmware recognises the battery correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the ICW-1000G charge circuit and confirmed the BMS accepted the pack without fault flags. Charge termination triggered cleanly at 4.2V with no overcharge events observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use backup activation:\u003c\/strong\u003e\n    After fitting this battery, power cycle the phone and leave it on charge for a full four hours before testing backup function. The ICW-1000G firmware will not route power through the backup circuit until the cell has completed at least one full charge cycle from the mains adapter.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ICW-1000G drops its settings when mains power cuts\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ICW-1000G stores active call settings and network configuration in volatile memory backed by the battery. If the replacement cell ships below 3.5V from storage, the phone's backup circuit sees it as insufficient and bypasses it entirely during a power cut. This means settings revert to defaults even though a battery is physically present. Charge the phone to 4.2V before any outage test — the backup circuit will not activate below that threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone shows low battery warning immediately after new cell is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage and shipping, so the KAL523450AR replacement may arrive at 3.3–3.6V — below the ICW-1000G's low-battery threshold of roughly 3.7V. The phone reads that resting voltage and immediately flags a low-battery warning, even with a brand-new cell installed. This is not a fault with the battery. Place the phone on its charger and allow a full charge cycle; the warning will clear once the cell reaches 3.9V or above.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428090609754,"sku":"BWCS-UDG100SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428090642522,"sku":"BWCS-UDG100SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428090675290,"sku":"BWCS-UDG100SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UDG100SL-1.webp?v=1779934037"},{"product_id":"netgear-sph-101-replacement-battery-37v-950mah-li-ion","title":"Netgear SPH-101 VoIP Phone Compatible Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNetgear SPH-101 — 3.7V Li-ion Replacement Battery (300-10021-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 950mAh Li-ion cell replaces the OEM battery in the Netgear SPH-101 VoIP cordless handset. The SPH-101 is a Wi-Fi-based VoIP phone — this battery keeps the handset operational and, when fully charged, allows the phone to function through brief power interruptions. Match the OEM part number 300-10021-01 before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSPH-101 handset fit:\u003c\/strong\u003e\n    The SPH-101 uses a dedicated 3.7V single-cell pack with a specific connector orientation and contact arrangement. Voltage and physical format must match — substituting a generic pack of similar size risks a connector mismatch or BMS communication failure with the handset's charge circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the SPH-101 platform and confirmed the BMS accepted the pack without triggering a fault state. Charge termination occurred correctly at 4.2V and the handset did not flag a battery error on the status screen.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for backup activation:\u003c\/strong\u003e\n    After installing this battery, power-cycle the handset and place it on charge for a full four hours before testing backup function. The SPH-101's firmware will not engage the backup circuit until the cell crosses the minimum charge threshold — testing backup power before that point will appear as a failure even with a good cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SPH-101 shows a low battery warning immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in a storage state, typically between 30–50% charge. The SPH-101 reads cell voltage directly and compares it against a threshold — if the resting voltage sits below roughly 3.6V, the handset displays a low battery indicator regardless of whether the cell is new. This is not a fault with the battery. Place the handset on its base and allow a full charge cycle to complete before drawing any conclusions about the replacement cell's condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSPH-101 loses programmed settings when mains power drops after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SPH-101 relies on the backup battery to hold volatile memory — Wi-Fi credentials, SIP registration, and speed-dial entries — during a mains outage. If the replacement cell has not reached a full charge state, the backup circuit will not sustain the phone and settings will reset on power restoration. This is a firmware-enforced protection, not a hardware fault. Charge the handset uninterrupted for four hours, confirm the battery indicator shows full, then test backup behaviour by pulling mains power briefly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428090708058,"sku":"BWCS-SPH101SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428090740826,"sku":"BWCS-SPH101SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428090773594,"sku":"BWCS-SPH101SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPH101SL_1.webp?v=1779934037"},{"product_id":"belkin-wifi-skype-phone-replacement-battery-37v-1050mah-li-ion","title":"Belkin W0001 WiFi Skype Phone Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBelkin WiFi Skype Phone (W0001) — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1050mAh Li-ion battery replaces the internal cell in the Belkin WiFi Skype Phone. It fits models W0001, F1PP000GN-SK, WSKP100, and the general WiFi Phone variant. Capacity is sourced from the product specification — 3.89Wh total.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompatible models — W0001, F1PP000GN-SK, WSKP100:\u003c\/strong\u003e\n    These units share the same 3.7V single-cell architecture and physical connector. The battery management system expects a standard Li-ion charge curve, so no firmware configuration is needed after swapping the cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a VoIP phone platform. The BMS accepted the cell without error flags, and the charging circuit stepped down correctly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charge protocol for WiFi VoIP phones:\u003c\/strong\u003e\n    After installing, power cycle the phone and leave it on charge for at least four hours before testing standby or backup function. The phone's backup circuit will not activate until the cell reaches its charge threshold — testing before that point gives a false low-battery result.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Belkin WiFi Phone drops VoIP calls when mains power flickers\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe W0001 uses the internal battery as a bridge during brief power interruptions. If the cell is depleted or freshly installed without a full charge cycle, the phone cannot sustain the WiFi radio during even a short dropout. The result is a dropped call — not a slow fade, but an immediate disconnect. A fully charged cell holds the phone online through short outages without any call interruption.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone shows low battery warning immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because replacement cells ship in a storage state — typically at 30–50% charge. The phone reads the cell voltage on startup and triggers a low-battery flag if it sits below the firmware threshold, usually around 3.5V. This is not a fault with the battery. Connect the phone to mains power and let it charge uninterrupted until the indicator clears, confirming the cell has reached at least 4.1V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428090806362,"sku":"BWCS-BKW001SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428090839130,"sku":"BWCS-BKW001SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428090871898,"sku":"BWCS-BKW001SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKW001SL-1.webp?v=1779934014"},{"product_id":"smc-skype-wifi-phone-replacement-battery-37v-1050mah-li-ion","title":"SMC Skype Wifi Phone 3.7V 1050mAh Li-ion Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSMC Skype Wifi Phone — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1050mAh Li-ion cell replaces the internal backup battery in the SMC Skype Wifi Phone. It restores the phone's ability to hold power when mains supply drops, keeping VoIP calls and saved settings intact. Voltage and capacity match the original cell exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSMC Skype Wifi Phone fit:\u003c\/strong\u003e\n    This phone runs a single-cell Li-ion pack at 3.7V nominal. The backup circuit draws directly from this cell during outages — voltage, connector, and physical dimensions all need to match the original for the phone to recognise and use the battery correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles and confirmed the BMS accepts a charge from the phone's internal charging circuit without fault flags. Capacity held within expected range of the 1050mAh rating across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge requirement:\u003c\/strong\u003e\n    After fitting this battery, leave the phone on mains power for a full 4 hours before testing backup function. The phone's firmware will not route power through the backup circuit until the cell clears a minimum charge threshold — testing too early will make it appear the battery isn't working.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SMC Skype Wifi Phone loses saved settings during a power cut\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the backup battery is depleted or missing, the phone has no power source to hold volatile memory during mains loss. Network credentials, Skype account data, and call settings are stored in RAM that needs continuous power to persist. A degraded cell can measure 3.7V at rest but collapse under the small load the phone's memory circuit draws. Replacing the cell and completing a full charge cycle before the next outage is the only fix.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new battery shipped from storage can sit at 3.2–3.3V, which is below the threshold the phone's firmware uses to clear a low-battery flag. The phone reads state-of-charge from voltage, not from a fuel gauge chip, so a partially discharged new cell triggers the same warning as a worn-out one. Connect the phone to mains and allow the cell to charge uninterrupted — the warning clears once the cell climbs past approximately 3.6V. Do not assume the replacement cell is faulty until it has completed at least one full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428090904666,"sku":"BWCS-BKW001SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428090937434,"sku":"BWCS-BKW001SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428090970202,"sku":"BWCS-BKW001SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKW001SL-1.webp?v=1779934014"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-UDG100SL-4.webp?v=1780021985","url":"https:\/\/batteryweb.com\/collections\/voip-phone.oembed","provider":"BatteryWeb","version":"1.0","type":"link"}