{"product_id":"vivo-iqoo-neo5s-replacement-battery-774v-2200mah-li-polymer","title":"Vivo IQOO Neo5S B-S9 Replacement Battery 7.74V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVivo IQOO Neo5S — 7.74V Li-Polymer Replacement Battery (B-S9)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.74V, 2200mAh Li-Polymer replacement battery for the Vivo IQOO Neo5S smartphone. It carries OEM part number B-S9 and slots into the Neo5S chassis to restore power to the processor, display, and wireless radios. Use the product data capacity figure — 2200mAh \/ 17.03Wh — as the reference spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIQOO Neo5S fit:\u003c\/strong\u003e\n    The Neo5S uses a dual-cell Li-Polymer configuration at a nominal 7.74V rail. The B-S9 matches that voltage, connector pinout, and BMS handshake — the phone's charge IC will recognise the cell and accept charge negotiation without triggering a hardware fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on the Neo5S board. The BMS held the 4.45V per-cell ceiling correctly, cutoff engaged cleanly at the low-voltage threshold, and the charge IC completed a full cycle without error flags in the system log.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast-charge calibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current fast charging pushes current into 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\"\u003eWhy the IQOO Neo5S reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the Neo5S learns a cell's discharge curve over time and stores that data in firmware. When you fit a new cell, the IC is still referencing the old degraded curve, so percentage readings can sit 10–20% off actual state of charge. One full standard charge-discharge cycle forces the coulomb counter to recalibrate against the new cell's actual voltage slope. After that cycle, percentage accuracy typically stabilises within two to three further charges.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet mapped the new cell's voltage cliff — the point where cell voltage drops sharply under modem or display load. The phone's protection circuit reads that voltage drop as a low-cell event and cuts power before the displayed percentage reaches zero. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% at standard current. That single cycle gives the coulomb counter enough data to place the low-voltage cutoff at the correct percentage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391854805082,"sku":"BWCS-BKS510SL-1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391854837850,"sku":"BWCS-BKS510SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391854870618,"sku":"BWCS-BKS510SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BKS510SL-1.webp?v=1779142367","url":"https:\/\/batteryweb.com\/products\/vivo-iqoo-neo5s-replacement-battery-774v-2200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}