{"product_id":"honor-90-pro-replacement-battery-39v-4900mah-li-polymer","title":"Honor 90 Pro HB506590EHW Replacement Battery 3.9V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHonor 90 Pro — 3.9V Li-Polymer Replacement Battery (HB506590EHW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4900mAh 3.9V lithium-polymer cell for the Honor 90 Pro smartphone. It replaces the original HB506590EHW pack when the existing cell has degraded, lost capacity, or stopped holding a charge. Capacity is rated at 19.11Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHonor 90 Pro fit:\u003c\/strong\u003e\n    The 90 Pro uses a dedicated battery bay sized for an 88.80 × 64.30 × 4.90mm cell. This replacement matches that footprint exactly, and the connector and BMS handshake align with the charge IC on the 90 Pro's mainboard.\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 90 Pro platform. The BMS communicated correctly with the device's fuel gauge IC, and charge termination triggered at the correct cut-off voltage without error flags.\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 lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current 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 Honor 90 Pro reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 90 Pro uses a coulomb counter that builds its discharge model against the original cell's impedance profile. When a new cell goes in, that model is stale — the IC is measuring against a curve that no longer matches. This causes the percentage display to read high or low by a significant margin, especially in the mid-range. One full uninterrupted discharge-to-low, then a full charge, forces the IC to rewrite its reference table. After that cycle, percentage accuracy normalises.\u003c\/p\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\"\u003eA new lithium-polymer cell at rest can hold a nominal voltage that satisfies the fuel gauge, but under the combined load of the modem, display, and CPU, the cell's internal resistance causes a voltage sag that drops below the BMS protection threshold instantly. The system cuts power before the percentage counter catches up — so the phone appears to shut off with charge remaining. This is most common on the first few cycles before the cell's internal resistance settles. Run two or three full cycles and the voltage sag narrows; shutdowns at 20–30% typically stop once the cell stabilises above 3.5V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391804899418,"sku":"BWCS-HNR910SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391804932186,"sku":"BWCS-HNR910SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391804964954,"sku":"BWCS-HNR910SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNR910SL-1.webp?v=1779142181","url":"https:\/\/batteryweb.com\/products\/honor-90-pro-replacement-battery-39v-4900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}