{"product_id":"hp-slate-8-pro-replacement-battery-37v-5650mah-li-polymer","title":"HP Slate 8 Pro Replacement Battery 3.7V 5650mAh HSTNH-C13C-S","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Slate 8 Pro \/ Slate 8 Plus — 3.7V Li-Polymer Replacement Battery (HSTNH-C13C-S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 5650mAh (20.91Wh) lithium-polymer battery replaces part number HSTNH-C13C-S in the HP Slate 8 Pro and Slate 8 Plus tablets, including model variants 7600US and HSTNH-H408C. It fits the original battery bay without modification and connects via the stock internal connector. Capacity matches the factory specification listed in product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSlate 8 Pro and Slate 8 Plus compatibility:\u003c\/strong\u003e\n    Both models share the same 3.7V battery rail, physical footprint, and BMS handshake protocol — the HSTNH-C13C-S part number covers both. The BY02 and BY02021 references are alternate OEM codes for the same cell, not different batteries.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle on a Slate 8 Pro unit. The charge IC accepted the cell without fault flags, BMS communication stayed active throughout, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after installation:\u003c\/strong\u003e\n    Once installed, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% before using it again. The fuel gauge IC was calibrated to the old cell — one complete cycle resets it against the new one and clears inaccurate percentage readings from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Slate 8 Pro shuts down at 15–25% remaining\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Slate 8 Pro drives a backlit display and active WiFi simultaneously — both are voltage-sensitive loads. When the cell voltage dips under combined draw, the BMS interprets it as a low-voltage condition and cuts power before the reported percentage reaches zero. This is a calibration issue, not a cell fault. After one full discharge-to-shutoff cycle followed by an uninterrupted charge to 100%, the fuel gauge IC remaps the actual voltage curve of the new cell and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging unavailable after battery swap on the Slate 8 Plus\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome users find the tablet reverts to standard charge speeds after a battery replacement. The charge controller re-negotiates its charging profile on the first accepted cycle with a new cell — this is expected behaviour, not a faulty battery. Let the tablet complete one full charge from near-zero to 100% via the original HP charger without interruption. After that cycle, the controller locks in the correct charge profile and faster input rates resume. Confirm with the original HP charger, not a third-party cable, as input voltage floor matters here.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426019770458,"sku":"BWCS-HPE810SL-1","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426019803226,"sku":"BWCS-HPE810SL-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426019835994,"sku":"BWCS-HPE810SL-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPE810SL-1.webp?v=1779930219","url":"https:\/\/batteryweb.com\/products\/hp-slate-8-pro-replacement-battery-37v-5650mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}