{"product_id":"marshall-emberton-3-replacement-battery-74v-2600mah-li-ion","title":"Marshall Emberton 3 Replacement Battery 7.4V 2600mAh B0797","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMarshall Emberton 3 — 7.4V Li-ion Replacement Battery (B0797)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2600mAh Li-ion battery for the Marshall Emberton 3 portable Bluetooth speaker. It replaces OEM part B0797, which powers audio playback and wireless connectivity in the Emberton 3 and Emberton III. Swap it in when the original cell no longer holds a charge or capacity has dropped noticeably.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEmberton 3 and Emberton III compatibility:\u003c\/strong\u003e\n    Both the Emberton 3 and Emberton III share the same battery bay geometry, connector pinout, and BMS handshake protocol — the B0797 cell fits both 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 Emberton 3 platform. The BMS accepted the pack without error flags, voltage held steady under combined amplifier and Bluetooth radio draw, and the fuel gauge reported accurately across the full state-of-charge range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly discharge cycle for Emberton 3 users:\u003c\/strong\u003e\n    Let the speaker run down below 20% at least once a month before recharging. The Emberton 3 is often kept on a desk and topped off constantly — cycling without a full discharge causes fuel gauge drift, so the indicator reads full while actual capacity has quietly dropped.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Emberton 3 audio drops at high volume even on a fresh charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt maximum volume the amplifier and Bluetooth radio draw current simultaneously, creating short but sharp load spikes. If the cell's internal resistance has risen — either from age or shallow cycling — voltage sags under that combined draw. The BMS interprets the sag as a low-cell condition and throttles output to protect the cell. Installing a cell with lower internal resistance restores stable voltage delivery under high combined load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEmberton 3 won't wake from USB-C when the battery is fully flat\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the cell discharges below roughly 2.5V per cell, the BMS enters deep-protection mode and disconnects the output rail entirely. In this state the speaker will not respond to a USB-C cable because the charger cannot negotiate PD handshake without a minimum voltage present at the port. Plug the cable in and leave it connected for 10–15 minutes without pressing any button — the BMS needs that window to trickle enough charge back into the cell to exit protection mode and re-enable the USB negotiation circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416176427098,"sku":"BWCS-MRT300SL-1","price":60.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416176459866,"sku":"BWCS-MRT300SL-2","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416176492634,"sku":"BWCS-MRT300SL-3","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MRT300SL_1.webp?v=1779760648","url":"https:\/\/batteryweb.com\/products\/marshall-emberton-3-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}