{"product_id":"prestigio-pap5450-duo-replacement-battery-37v-1300mah-li-ion","title":"Prestigio PAP5450 DUO Replacement Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePrestigio PAP5450 DUO — 3.7V Li-ion Replacement Battery (PAP5450 DUO)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh Li-ion replacement battery for the Prestigio PAP5450 DUO and PSP5457 DUO dual-SIM Android smartphones. It fits directly in place of the original cell when the factory battery no longer holds a charge or fails to power the device. Capacity is rated at 4.81Wh, matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePAP5450 DUO and PSP5457 DUO fit:\u003c\/strong\u003e\n    Both devices share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol — one battery covers both models without modification.\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 discharge on the PAP5450 DUO platform, confirmed BMS communication was accepted without fault flags, and verified the protection circuit trips correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.\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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the fuel gauge IC still holds the discharge curve of the old battery. The new cell has a steeper voltage drop under load — particularly during dual-SIM radio polling or screen-on bursts — and the phone hits the hardware low-voltage cutoff before the OS gauge reaches zero. The result is an abrupt shutdown while the display still shows 20–30% remaining. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the coulomb counter to recalibrate against the actual cell curve. After that cycle, reported percentage and true cell state should align.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf a PAP5450 DUO has been stored with a depleted battery, the cell can drop below 2.5V per cell — the threshold where the BMS locks out to prevent damage. Plugging in the charger will often show no response, not even a charging indicator. Connect the device to a low-current USB source (500mA wall adapter or PC port, not a fast charger) and leave it connected for 20–30 minutes without attempting to power on. The BMS trickle-charges the cell back above the lockout threshold, typically around 3.0V, at which point normal charging resumes and the device powers on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392048922714,"sku":"BWCS-PMP545SL-1","price":26.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43392048955482,"sku":"BWCS-PMP545SL-2","price":29.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43392048988250,"sku":"BWCS-PMP545SL-3","price":32.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PMP545SL-1.webp?v=1779143125","url":"https:\/\/batteryweb.com\/products\/prestigio-pap5450-duo-replacement-battery-37v-1300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}