{"product_id":"sanyo-scp-3810-replacement-battery-37v-1100mah-li-ion","title":"Sanyo SCP-35LBPS Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSanyo SCP-3810 — 3.7V Li-ion Replacement Battery (SCP-35LBPS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement cell for the Sanyo SCP-3810 and Mirro SCP-3810 candybar-style mobile phones. It matches the OEM part number SCP-35LBPS and fits the original battery compartment at 54.20 × 33.10 × 5.20mm. Swap it when the original cell no longer holds enough charge to get through a day of calls.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSCP-3810 and Mirro SCP-3810 fit:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail — one cell covers both. The BMS communicates over the same two-pin thermistor line used across this Sanyo handset family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the SCP-3810 platform. The BMS held charge termination at 4.2V and engaged undervoltage lockout cleanly at 3.0V with no false cutoffs mid-cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After fitting this cell, run one complete discharge to auto-off before recharging. The SCP-3810's fuel gauge IC carries the old cell's discharge curve in memory — one full cycle overwrites it against the new cell's actual characteristics and stops erratic percentage readings.\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 SCP-3810 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAged Li-ion cells develop a steep voltage cliff — voltage drops sharply under modem transmit or backlight load before the fuel gauge registers low. The phone's protection circuit reads that voltage drop as a hard undervoltage event and cuts power instantly, even though the displayed percentage still shows charge remaining. A new cell has a flatter discharge curve, but the fuel gauge IC is still calibrated to the old cell's steep cliff. Run one full discharge-to-shutdown cycle and then a full charge — the coulomb counter resets its endpoint map and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSCP-3810 not powering on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells in storage self-discharge over months. If the cell drops below 2.5V per cell, the BMS enters deep-discharge lockout and blocks all charge current to prevent cell damage. Plugging into a standard charger does nothing — the phone shows no charge indicator and will not boot. Connect the phone to a USB charger and leave it completely undisturbed for 20–30 minutes; the charge IC on some Sanyo handsets trickle-charges at a low pre-qualification current to bring the cell back above the 2.7V recovery threshold before resuming normal CC\/CV charging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405088555098,"sku":"BWCS-SY3810XL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405088587866,"sku":"BWCS-SY3810XL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405088620634,"sku":"BWCS-SY3810XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SY3810XL-1.webp?v=1779369970","url":"https:\/\/batteryweb.com\/products\/sanyo-scp-3810-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}