{"product_id":"spectralink-versity-9540-replacement-battery-385v-3000mah-li-ion","title":"SpectraLink Versity 9540 Compatible Battery BLI0000100 3.85V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSpectraLink Versity 9540 Series — 3.85V Li-ion Replacement Battery (BLI0000100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3000mAh Li-ion cell replaces OEM part BLI0000100 in the SpectraLink Versity 9540, 9553, 9653, and 9640 enterprise handsets. These are business-grade wireless phones used in hospital, retail, and warehouse environments where the handset runs on shift for extended periods. Capacity figure is 3000mAh — use this, not third-party listings that vary.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVersity 9540 \/ 9553 \/ 9553 \/ 9640 platform fit:\u003c\/strong\u003e\n    All four models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The fuel gauge IC reads the same cell authentication data across the Versity line, so one cell revision covers the full group without BMS rejection at boot.\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 load on Versity-compatible test rigs. The BMS accepted the cell without fault codes, and the coulomb counter initialised correctly after one full discharge-charge cycle. No protection trip occurred under simulated voice-call current draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — a step specific to the Versity platform's tight BMS tolerance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Versity after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Versity handset's fuel gauge IC builds its state-of-charge model from the previous cell's discharge curve. When a new cell goes in, that curve no longer matches, so the IC declares empty at a voltage that still has usable capacity in the new cell. Under modem or screen load, the handset hits the low-voltage cutoff before the percentage display reaches zero. One full discharge down to auto-off, followed by a full uninterrupted charge, resets the coulomb counter. After that cycle, shutdowns at 20–30% stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSpectraLink Versity not powering on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if a cell drops below 2.5V per cell, the BMS latches into lockout to prevent damage. The Versity will show nothing on screen — no charging indicator, no boot screen. Connect the handset to the original SpectraLink desk charger, not a generic USB cable, and leave it for 20–30 minutes before attempting to power on. The charger's trickle-charge stage applies a low current that brings the cell back above the 2.5V BMS re-enable threshold before full charge resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391851855962,"sku":"BWCS-SPV955SL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391851888730,"sku":"BWCS-SPV955SL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391851921498,"sku":"BWCS-SPV955SL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPV955SL-1.webp?v=1779142388","url":"https:\/\/batteryweb.com\/products\/spectralink-versity-9540-replacement-battery-385v-3000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}