{"product_id":"ember-mug-2-replacement-battery-74v-3500mah-li-ion","title":"Ember Mug 2 Replacement Battery 7.4V 3500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEmber Mug 2 — 7.4V Li-ion Replacement Battery (INR18650 MH1-2S1P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 3500mAh Li-ion battery pack for the Ember Mug 2. It fits the 2S1P cell configuration the Mug 2 uses to power its heating element and temperature sensor. Install this when your mug no longer holds a charge or can't sustain its set temperature.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEmber Mug 2 compatibility:\u003c\/strong\u003e\n    The Mug 2 uses a 7.4V two-cell series pack with a dedicated BMS that monitors cell balance and temperature during heating cycles. This replacement matches that voltage rail and BMS handshake — the firmware won't activate the heater without the correct cell count and voltage signal.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full heat cycles on the Mug 2. The BMS held cell balance within spec under heater load, and the temperature sensor received a stable voltage throughout. No mid-cycle cutoffs occurred during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install charge cycle:\u003c\/strong\u003e\n    After fitting this battery, charge the mug to 100% before first use. The Mug 2 firmware runs a calibration pass from full charge — skipping this causes the temperature control loop to read thermostat targets inaccurately on the first few cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Mug 2 stops heating before reaching your set temperature\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Mug 2's heating element draws a sustained high current to reach and hold temperature. As a Li-ion pack ages, internal resistance climbs — under heater load, voltage sags below the threshold the BMS needs to keep the element active. The mug may show a full charge indicator but still cut heating short. A replacement pack with low internal resistance restores the sustained voltage the heater circuit requires.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMug 2 not reconnecting to the Ember app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA complete power interruption — which a battery swap causes — clears the mug's active Bluetooth pairing state. The Ember app treats this as an unknown device rather than a known mug. Open the app, remove the mug from your device list, then hold the mug's button for five seconds to enter pairing mode. Re-add it as a new device to restore full app control.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416148672602,"sku":"BWCS-EMB200SL-1","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416148705370,"sku":"BWCS-EMB200SL-2","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416148738138,"sku":"BWCS-EMB200SL-3","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EMB200SL-1.webp?v=1779760467","url":"https:\/\/batteryweb.com\/products\/ember-mug-2-replacement-battery-74v-3500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}