{"product_id":"sanyo-scp-7400-replacement-battery-37v-1600mah-li-ion","title":"Sanyo SCP-7400 Replacement Battery 3.7V 1600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSanyo SCP-7400 \/ MM-7400 — 3.7V Li-ion Replacement Battery (SCP-13LBPS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1600mAh Li-ion battery for the Sanyo SCP-7400 and MM-7400 candybar-style phones. It replaces OEM part numbers SCP-13LBPS and CSYO7400LIO. If your phone no longer holds a charge or shuts off unexpectedly, this cell restores full operating voltage to the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSCP-7400 and MM-7400 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail. One cell fits all variants listed — SCP7400, MM7400, and MM-7400 — because the housing and BMS handshake are identical across the range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and load on the SCP-7400 platform. The BMS held cutoff at the correct thresholds, charge acceptance was normal from 0%, and the protection circuit tripped cleanly at the expected over-discharge floor.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable any fast-charge accessory for the first full discharge-to-charge cycle. The phone's fuel gauge IC is calibrated to the old cell's discharge curve. One uninterrupted cycle at standard current lets it relearn the new cell before high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SCP-7400 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SCP-7400 uses a fuel gauge IC that tracks charge state by measuring voltage against a stored discharge curve from the original cell. A new cell has a different internal impedance profile, so the IC maps voltage to percentage incorrectly at first. The phone may show 80% when the actual state of charge is closer to 50%, or jump erratically between readings. One full discharge down to automatic shutoff, followed by an uninterrupted charge to 100%, resets the coulomb counter against the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — the screen backlight and RF transmitter together pull enough current to cause a voltage cliff the fuel gauge did not predict. The phone reads 25% but the cell is already below the BMS cutoff threshold under that combined load. It is not a faulty battery; it is the IC still using the old cell's voltage-to-capacity map. After the first full calibration cycle, the percentage at shutdown should align to below 5% at a resting cell voltage of approximately 3.5V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405153861722,"sku":"BWCS-SY7400XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405153894490,"sku":"BWCS-SY7400XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405153927258,"sku":"BWCS-SY7400XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SY7400XL-1.webp?v=1779370299","url":"https:\/\/batteryweb.com\/products\/sanyo-scp-7400-replacement-battery-37v-1600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}