{"product_id":"oppo-a52-replacement-battery-385v-3000mah-li-polymer","title":"Oppo A52 BLP781 Replacement Battery 3.85V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOppo A52 \/ CPH2061 — 3.85V Li-Polymer Replacement Battery (BLP781)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3000mAh Li-Polymer cell replaces the original BLP781 battery in the Oppo A52 (CPH2061). It restores power to a phone that no longer holds charge through a normal day. Voltage and dimensions match the original: 88.40 × 62.43 × 4.00mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA52 and CPH2061 fitment:\u003c\/strong\u003e\n    Both model references share the same PCB layout, BMS handshake protocol, and BLP781 connector pinout — one cell covers both variants 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 A52 platform. The BMS accepted the cell without error flags, and the charge IC progressed normally through CC and CV phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated coulomb counter.\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\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The phone reads 25% remaining, but the new cell's actual voltage under modem and screen load drops faster than the old curve predicts. The system hits its low-voltage cutoff before the gauge catches up. One full discharge-charge cycle with fast charging disabled forces the coulomb counter to recalibrate — after that, the percentage readout tracks correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVOOC fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOppo's VOOC protocol requires the charge IC to confirm cell impedance is within an expected range before switching to high-current mode. A new cell can present slightly elevated impedance on cycle one, causing the charger to fall back to standard 5V\/1A input. This is not a fault with the cell or the adapter. Complete one full standard charge cycle — impedance normalises and VOOC re-engages on the next charge without any further action.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391904514138,"sku":"BWCS-OPA520SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391904546906,"sku":"BWCS-OPA520SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391904579674,"sku":"BWCS-OPA520SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OPA520SL-1.webp?v=1779142626","url":"https:\/\/batteryweb.com\/products\/oppo-a52-replacement-battery-385v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}