{"product_id":"microsoft-surface-book-3-135-keyboard-replacement-battery-1136v-4800mah-li-polymer","title":"Microsoft Surface Book 3 13.5 Keyboard Compatible Battery 11.36V 4800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMicrosoft Surface Book 3 13.5 Keyboard — 11.36V Li-Polymer Replacement Battery (G3HTA065H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.36V, 4800mAh (54.53Wh) Li-Polymer battery replaces the OEM G3HTA065H cell inside the detachable keyboard base of the Surface Book 3 13.5-inch. The keyboard base houses its own independent battery pack, separate from the display unit. Replacing this cell restores full keyboard, trackpad, and base-mode functionality.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSurface Book 3 13.5 keyboard base fit:\u003c\/strong\u003e\n    The 13.5-inch keyboard base uses a dedicated battery rail and BMS that communicates charge state to Windows independently from the display battery. Voltage and connector specs must match exactly — this cell meets both requirements for that unit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Surface Book 3 keyboard base BMS and confirmed charge acceptance, proper state-of-charge reporting, and stable voltage across the full discharge curve without BMS trip events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    After fitting this battery, run the keyboard base down to automatic shutoff, then charge it uninterrupted to 100% before detaching the display. This one full cycle resets the fuel gauge IC against the new cell and clears the inaccurate percentage readings that typically appear after a swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Surface Book 3 keyboard base shows a different charge percentage than the display\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Surface Book 3 runs two separate battery systems — one in the display, one in the keyboard base — and Windows reports them independently in the taskbar flyout. After a keyboard battery replacement, the base BMS has no calibration data for the new cell, so the reported percentage drifts from actual capacity. This is a firmware-level fuel gauge issue, not a hardware fault. One full discharge-to-shutoff followed by an uninterrupted charge to 100% gives the BMS the data it needs to report accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSurface Book 3 keyboard battery stuck at 0% and not charging after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the keyboard base reports 0% and won't accept a charge after install, the BMS may have entered a protection state during shipping or handling at low voltage. Connect the Surface Book 3 to the Surface Connect charger with the keyboard attached and leave it for at least 20 minutes without waking the device. The charge IC needs a trickle phase to bring the cell above the BMS re-enable threshold — typically around 3.0V per cell — before normal charging resumes. If the percentage remains at 0% after 30 minutes on charge, detach and reattach the keyboard base to trigger a fresh BMS handshake with Windows.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425830338650,"sku":"BWCS-MCR135SL-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425830371418,"sku":"BWCS-MCR135SL-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425830404186,"sku":"BWCS-MCR135SL-3","price":122.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MCR135SL-1.webp?v=1779929903","url":"https:\/\/batteryweb.com\/products\/microsoft-surface-book-3-135-keyboard-replacement-battery-1136v-4800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}