{"product_id":"unify-openstage-m3-replacement-battery-37v-650mah-li-ion","title":"Unify OpenStage M3 Replacement Battery 3.7V 650mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUnify OpenStage M3 \/ M3 Plus — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 650mAh Li-ion battery fits the Unify OpenStage M3 and OpenStage M3 Plus cordless DECT handsets. It replaces the internal cell that powers the handset during calls and standby. No OEM part number is published for this battery; fitment is confirmed by voltage, physical dimensions (52.00 × 39.04 × 5.50mm), and connector position.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOpenStage M3 and M3 Plus compatibility:\u003c\/strong\u003e\n    Both handset variants share the same internal battery bay dimensions and 3.7V supply rail. The connector orientation and PCB tab spacing are identical across both models, so one cell covers the full range.\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 OpenStage M3 platform. The BMS accepted charge from the base station without triggering a fault state, and voltage held stable across low and high RF transmit events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for Li-ion DECT handsets:\u003c\/strong\u003e\n    After fitting, seat the handset in the base and leave it undisturbed for a full charge cycle before first use. Li-ion cells shipped in storage state can read falsely low on the handset's fuel gauge until the BMS completes one full calibration cycle.\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 original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-ion cell arriving from storage carries a partial charge, and the handset's fuel gauge calibrates against that reduced starting point. The BMS needs one or two complete charge-to-discharge cycles to map the cell's actual capacity. Until those cycles complete, the handset will report lower charge levels than the battery actually holds. Run two full cycles in the base before drawing conclusions about talk time.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHandset not pairing with base after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts all power to the handset's DECT module, which can erase the stored pairing data on some OpenStage M3 units. The base station retains its registration, but the handset's local DECT subscription record may be lost. Re-registering the handset from the base station's admin menu restores the link. Check the OpenStage M3 user guide for the registration sequence — it typically takes under two minutes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43339906842714,"sku":"BWCS-SXM20CL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43339906875482,"sku":"BWCS-SXM20CL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43339906908250,"sku":"BWCS-SXM20CL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SXM20CL-1.webp?v=1778366945","url":"https:\/\/batteryweb.com\/products\/unify-openstage-m3-replacement-battery-37v-650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}