{"product_id":"prestigio-psp3450-duo-replacement-battery-37v-1500mah-li-ion","title":"Prestigio PSP3450 DUO Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePrestigio PSP3450 DUO — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1500mAh Li-ion battery replaces the original cell in the Prestigio PSP3450 DUO dual-SIM smartphone. It fits the PSP3450 DUO directly and restores power when the original cell has degraded or failed. Capacity is 1500mAh (5.55Wh), matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePSP3450 DUO platform fit:\u003c\/strong\u003e\n    The PSP3450 DUO runs both SIM slots off a single 3.7V cell. Both modem radios draw from the same rail simultaneously, so the battery must hold voltage under split-modem load. This cell meets that rail voltage and connector spec 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 PSP3450 DUO platform. The BMS accepted the charge curve without fault flags, and both SIM slots remained active through the full discharge sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. The fuel gauge IC on the PSP3450 DUO calibrates its coulomb counter against the new cell's discharge curve — pushing high current into an uncalibrated cell skews the percentage readings from the first charge onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PSP3450 DUO reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a discharge curve profile tied to the original cell's internal resistance and capacity. When a new cell goes in, the IC still references the old curve. This causes the percentage display to jump or read incorrectly until the IC recalibrates. One full discharge to automatic shutdown followed by a full uninterrupted charge corrects the coulomb counter. After that cycle, percentage readings stabilise against the new cell's actual discharge curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the PSP3450 DUO\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff event, not a capacity failure. Under combined dual-SIM modem and display load, the cell voltage drops faster than the fuel gauge IC predicts — the BMS trips protection before the displayed percentage reaches zero. It happens most often when both SIM slots are active and the screen is on full brightness. Run one full calibration cycle first. If shutdowns continue, check that resting cell voltage is above 3.6V after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392029360218,"sku":"BWCS-PMS345SL-1","price":24.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43392029392986,"sku":"BWCS-PMS345SL-2","price":27.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43392029425754,"sku":"BWCS-PMS345SL-3","price":30.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PMS345SL-1.webp?v=1779143031","url":"https:\/\/batteryweb.com\/products\/prestigio-psp3450-duo-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}