{"product_id":"sennheiser-momentum-in-ear-replacement-battery-37v-120mah-li-polymer","title":"Sennheiser Momentum In-Ear Compatible Battery BA 170 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser Momentum In-Ear \/ Présence — 3.7V Li-Polymer Replacement Battery (BA 170)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 120mAh lithium-polymer cell replaces the OEM battery in the Sennheiser Momentum In-Ear and Présence wireless earbuds. Part number BA 170 (also listed as AHB471233PST) is the individual earbud cell — not a charging case pack. Capacity figure comes from our product data: 120mAh (0.44Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMomentum In-Ear and Présence compatibility:\u003c\/strong\u003e\n    Both models share the same earbud housing geometry, connector pinout, and BMS handshake protocol, which is why a single cell covers both lines. Swapping a cell from one model to the other works because the charge management IC reads the same cell chemistry and voltage range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full charge-discharge sequence on the Momentum In-Ear earbud. The BMS accepted the cell without error flags, balanced charging initiated correctly, and the protection circuit tripped cleanly at the rated cutoff voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station requirement:\u003c\/strong\u003e\n    After fitting a new cell, seat the earbud in the charging cradle and let it complete one full charge cycle before use. The base station logs the new cell during this cycle — skipping it causes the talk-time indicator to report inaccurate figures for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Présence earbud cuts out mid-call after a cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Présence draws power simultaneously from the audio amplifier and the DECT radio transmitter. That combined load briefly spikes current demand well above what a degraded or partially charged cell can deliver. A fresh cell at storage voltage — around 3.6V — may still trigger the BMS undervoltage cutoff under this spike. One full charge cycle in the base station brings the cell to 4.2V and eliminates the sag threshold issue.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but earbud shuts off after a few seconds\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the replacement cell arrives at storage voltage and the base station's charge detection circuit misreads it as already full. The cell never receives a proper charge cycle, so it holds just enough voltage to power on but collapses under audio load. Force a full reset by removing the earbud from the cradle for 30 seconds, then reseating it — the base should then detect the cell correctly and begin charging from 3.6V up to 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428119674970,"sku":"BWCS-SBA170SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428119707738,"sku":"BWCS-SBA170SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428119740506,"sku":"BWCS-SBA170SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBA170SL-1.webp?v=1779934189","url":"https:\/\/batteryweb.com\/products\/sennheiser-momentum-in-ear-replacement-battery-37v-120mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}