{"product_id":"honor-play-40-replacement-battery-389v-5100mah-li-polymer","title":"Honor Play 40 HB466594EGW Replacement Battery 3.89V 5100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHonor Play 40 \/ WDY-AN00 — 3.89V Li-Polymer Replacement Battery (HB466594EGW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 5100mAh Li-Polymer cell at 3.89V, sourced to match the OEM spec for the Honor Play 40 (WDY-AN00). It replaces a degraded original battery that no longer holds charge through a normal day. Physical dimensions are 92.70 × 64.90 × 4.70mm — measure your existing cell before fitting if the back cover shows any swelling.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlay 40 \/ WDY-AN00 fitment:\u003c\/strong\u003e\n    Both model references share the same battery bay geometry, connector pinout, and BMS handshake protocol. The HB466594EGW part number covers the full variant range — the fuel gauge IC on both boards reads the same cell identification signal.\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 Play 40 board, confirmed BMS handshake on first connection, and verified the charge IC accepted the full 5100mAh load without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge down to auto-shutdown, then charge to 100% on standard current. This gives the coulomb counter a clean reference curve before fast charge pushes high 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\"\u003eSudden shutdown at 20–30% on the Honor Play 40 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different discharge curve than the worn cell the fuel gauge IC was calibrated against. Under heavy load — modem transmission, screen at full brightness, GPS active — the cell voltage drops sharply at around 3.5V while the gauge still reads 20–30%. The phone interprets this as a valid state of charge until voltage collapses below the BMS cutoff threshold. One full discharge-charge cycle on standard current resets the coulomb counter and eliminates most of these early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eHonor's fast charge protocol requires the charge IC to negotiate with the BMS before stepping up current. On a fresh cell, the BMS starts in a conservative low-current mode until it confirms cell voltage stability over at least one partial charge cycle. Plugging in and seeing only a standard 5W charge rate on the first session is expected behaviour — not a fault with the cable or adapter. After the first full charge completes, disconnect and reconnect the charger; the fast charge handshake should activate and the charge IC will step up to the rated current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391804604506,"sku":"BWCS-HNP400SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391804637274,"sku":"BWCS-HNP400SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391804670042,"sku":"BWCS-HNP400SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNP400SL-1.webp?v=1779142181","url":"https:\/\/batteryweb.com\/products\/honor-play-40-replacement-battery-389v-5100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}