{"product_id":"polycom-spectralink-8400-replacement-battery-37v-1800mah-li-polymer","title":"Polycom Spectralink 8400 Replacement Battery 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePolycom Spectralink 8400 Series — 3.7V Li-Polymer Replacement Battery (1520-37214-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1800mAh Li-Polymer battery replaces OEM part 1520-37214-001 in the Polycom Spectralink 8400, 8450, 8452, and RS657 wireless handsets. These are enterprise DECT handsets used in hospital, retail, and warehouse environments. Capacity is 1800mAh (6.66Wh) — matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpectralink 8400 series compatibility:\u003c\/strong\u003e\n    The 8400, 8450, 8452, and RS657 share the same battery bay geometry, connector pinout, and voltage rail. One cell fits all four handsets without modification.\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 on the Spectralink 8452. The BMS accepted the charge handshake from the base station on first dock, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on Spectralink handsets:\u003c\/strong\u003e\n    Li-Polymer cells in these handsets arrive partially discharged from storage. Dock the handset in the base immediately after installation and leave it charging for a full charge cycle before use. Skipping this step can cause the handset to report lower capacity than rated for the first few sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated after battery swap in the 8400 series\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells shipped in partial-charge state do not always reach full capacity on the first charge cycle. The Spectralink base station terminates charge based on voltage, not elapsed time, so a cold cell may not fully saturate on the first dock. Run two to three full charge-and-discharge cycles to allow the cell to stabilise at its rated 1800mAh. After conditioning, the handset's battery indicator should reflect accurate remaining capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge light stays red or shows error after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell stored for several months can sit below the base station's minimum acceptance voltage. The charger circuit reads the cell as faulty and refuses to initiate a full charge cycle. To recover, place the handset in the base for at least 30 minutes without removing it — most Spectralink bases will trickle charge the cell up to the acceptance threshold (around 3.0V) before switching to normal charge mode. If the red light persists beyond 45 minutes, check that the handset is fully seated and the contacts are clean.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339880693850,"sku":"BWCS-SPT845CL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339880726618,"sku":"BWCS-SPT845CL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339880759386,"sku":"BWCS-SPT845CL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPT845CL-1.webp?v=1778366873","url":"https:\/\/batteryweb.com\/products\/polycom-spectralink-8400-replacement-battery-37v-1800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}