{"product_id":"prestigio-psp7505duo-replacement-battery-38v-1500mah-li-polymer","title":"Prestigio PSP7505DUO Replacement Battery 3.8V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePrestigio PSP7505DUO — 3.8V Li-Polymer Replacement Battery (HX336271AA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 1500mAh Li-Polymer replacement battery for the Prestigio PSP7505DUO smartphone. It carries OEM part number HX336271AA and fits both the PSP7505DUO and PSP7505 DUO variants. Dimensions are 69.70 × 59.45 × 3.32mm — confirm these against your existing cell before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePSP7505DUO and PSP7505 DUO compatibility:\u003c\/strong\u003e\n    Both model name variants use the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers both. The HX336271AA matches the voltage rail and charge termination logic the phone's charge IC expects.\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 a controlled bench setup. The BMS accepted charge termination at 4.35V without fault flags, and low-voltage cutoff triggered correctly before cell damage thresholds were reached.\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. This allows the fuel gauge IC to recalibrate its coulomb counter against the new cell's actual discharge curve before high-current charging is applied to an uncalibrated cell.\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 PSP7505DUO after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still reading the old cell's discharge curve. When the new cell hits a voltage point the IC hasn't mapped yet, it misreports remaining charge. Under modem load — active calls, mobile data — the cell voltage drops sharply and the phone's protection circuit shuts the device down even though the percentage display looks fine. One full discharge-charge cycle without fast charging resets the coulomb counter and eliminates the false cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting erratic or jumping battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PSP7505DUO's fuel gauge IC stores a learned discharge model for the previous cell. A new Li-Polymer cell with different internal resistance throws off those reference points immediately. The percentage can jump 10–15% in either direction during the first few charge cycles. Let the phone discharge to below 5% and charge uninterrupted to 100% twice — by the second full cycle, the coulomb counter stabilises and percentage reporting becomes accurate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392014352474,"sku":"BWCS-PMS750SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392014385242,"sku":"BWCS-PMS750SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392014418010,"sku":"BWCS-PMS750SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PMS750SL-1.webp?v=1779142920","url":"https:\/\/batteryweb.com\/products\/prestigio-psp7505duo-replacement-battery-38v-1500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}