{"product_id":"sennheiser-set-20-replacement-battery-24v-60mah-ni-mh","title":"Sennheiser BA150 Wireless Headset Replacement Battery 2.4V 60mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser SET-20 \/ SET-820S Series — 2.4V Ni-MH Replacement Battery (BA150)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 60mAh Ni-MH replacement cell for the Sennheiser BA150, BA151, and BA152 battery packs. It fits the SET-20, SET-820S, SET-810, SET-810S, and over 60 additional Sennheiser wireless headset models. The original cell in these packs degrades over time — this replacement restores full charging and talk-time performance without scrapping the headset.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSET-20 and SET-820S series compatibility:\u003c\/strong\u003e\n    These models share the same 2.4V two-cell Ni-MH configuration, identical connector pinout, and base-station charging logic. The BA150, BA151, and BA152 part numbers are interchangeable across this group — Sennheiser revised the part number twice without changing the underlying cell spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the SET-20 base station and confirmed full charge acceptance, correct charge-termination via delta-V detection, and clean voltage delivery to the DECT transmitter circuit under combined audio and radio draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station logging:\u003c\/strong\u003e\n    Place the headset in the base station and complete one uninterrupted full charge before making a call. DECT base stations track cell state from the first charge event — skipping this step causes the base to display a stale charge estimate that won't correct itself until a full cycle completes.\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 the new pack after fitting\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSennheiser DECT bases use delta-V charge termination, which requires the cell voltage to rise and then dip slightly before the base logs it as a valid pack. A fresh cell at storage voltage won't trigger this sequence immediately. Seat the headset firmly in the cradle and leave it for a full charge cycle — typically until the base LED changes state. If the base still shows an error after one full cycle, remove and reseat the headset to reset the contact handshake.\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 SET-20 draws simultaneously from the audio amplifier and the DECT radio transmitter — that combined load briefly spikes current demand above what a degraded or cold cell can supply cleanly. At 2.4V nominal, a voltage sag below approximately 1.9V causes the headset's under-voltage protection to cut transmission. If this happens on a new cell, the base has not yet completed its first full charge cycle and the cell is not at full capacity. Run one complete charge before diagnosing further — check that the base LED reaches its \"fully charged\" state before removing the headset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428160602202,"sku":"BWCS-SBA150SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428160634970,"sku":"BWCS-SBA150SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428160667738,"sku":"BWCS-SBA150SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBA150SL_1.webp?v=1779934278","url":"https:\/\/batteryweb.com\/products\/sennheiser-set-20-replacement-battery-24v-60mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}