{"product_id":"sennheiser-sdw-10-replacement-battery-37v-360mah-li-polymer","title":"Sennheiser SDW 10 Compatible Battery 3.7V 360mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser SDW 10 Series — 3.7V Li-Polymer Replacement Battery (AHB552826TPC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 360mAh lithium-polymer cell for the Sennheiser SDW 10 wireless DECT headset and related SDW series models. It fits the SDW 10, SDW 10 HS, SDW 5013, SDW 5014, and additional SDW variants sharing the same battery bay and connector. Swap it in when the original cell no longer holds enough charge to complete a full work session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSDW series compatibility:\u003c\/strong\u003e\n    These models share a common battery cavity, connector pinout, and BMS handshake protocol across the SDW 10 and SDW 5000 sub-series. The same 3.7V cell architecture runs both the DECT radio module and audio amplifier stage, so the pack is interchangeable across the listed variants without firmware conflict.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on an SDW base station and monitored the BMS handshake. The protection circuit responded correctly to charge termination and low-voltage cutoff, and the base station registered the new cell without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for DECT headsets:\u003c\/strong\u003e\n    Dock the headset in the base station and leave it undisturbed for a complete charge cycle before taking a call. The base needs to complete a full BMS log of the new cell before its talk-time estimate becomes accurate — pulling it early skips that calibration step.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising new pack after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SDW base uses a BMS handshake to confirm a valid cell before it begins charging. A new pack shipped at storage voltage — typically around 3.6V — can sit just below the threshold the base expects for an active cell. If the LED flashes an error or charging does not begin, remove the headset, wait 10 seconds, and re-dock it. In most cases the second dock attempt initiates the handshake correctly and charging starts within 30 seconds.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-call even with a recently charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SDW headset draws from the cell simultaneously for the DECT radio transmitter and the audio amplifier. That combined draw creates brief current spikes that can trip the BMS low-voltage cutoff if the cell voltage sags under load — even when the headset shows adequate charge at rest. This happens most on the first two or three cycles, before the cell reaches its rated capacity. Run three full charge-and-use cycles and the voltage sag on load decreases as the cell conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428118036570,"sku":"BWCS-SHW100SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428118069338,"sku":"BWCS-SHW100SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428118102106,"sku":"BWCS-SHW100SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHW100SL-1.webp?v=1779934190","url":"https:\/\/batteryweb.com\/products\/sennheiser-sdw-10-replacement-battery-37v-360mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}