{"product_id":"sendo-x-replacement-battery-37v-1250mah-li-ion","title":"Sendo X 3.7V Replacement Battery 8M24-0H000-00000 1250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSendo X — 3.7V Li-ion Replacement Battery (8M24-0H000-00000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1250mAh Li-ion replacement cell for the Sendo X smartphone. It matches the OEM part number 8M24-0H000-00000 and slots directly into the Sendo X battery bay. Capacity is 4.63Wh — identical to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSendo X platform fit:\u003c\/strong\u003e\n    The Sendo X ran a Symbian-based stack with a single Li-ion cell at 3.7V nominal. This replacement matches that voltage rail and the original connector pinout, so the device power management IC sees no mismatch on startup.\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 discharge-charge sequence and monitored BMS handshake behaviour. The protection circuit triggered correctly at both the low-voltage cutoff and the charge termination threshold — no false trips recorded.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable any fast-charge mode and run one complete discharge-charge cycle before normal use. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated baseline.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Sendo X after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Sendo X fuel gauge IC was calibrated against the original cell's internal resistance and voltage-discharge curve. A new cell has a different impedance profile, so the IC misjudges the remaining capacity. Under load — screen on, radio active — the cell voltage dips below the shutdown threshold before the reported percentage reaches zero. One full discharge-charge cycle resets the coulomb counter and closes that gap. Until then, expect the phone to cut out anywhere between 15% and 35%.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSendo X shows wrong battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores learned discharge data from the old cell. A fresh cell with a slightly different discharge curve causes the IC to report percentage values that don't match actual charge state — often jumping erratically or reading full charge too early. The fix is a single uninterrupted discharge down to automatic shutdown, followed by a full charge to 100% without interruption. After that cycle, the IC recalibrates its internal model against the new cell's voltage curve and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405146390618,"sku":"BWCS-8M24SL-1","price":32.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405146423386,"sku":"BWCS-8M24SL-2","price":36.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405146456154,"sku":"BWCS-8M24SL-3","price":40.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-8M24SL-big.webp?v=1779370262","url":"https:\/\/batteryweb.com\/products\/sendo-x-replacement-battery-37v-1250mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}