{"product_id":"microsoft-surface-book-2-1835-135-tablet-keyboard-replacement-battery-1136v-5000mah-li-polymer","title":"Microsoft Surface Book 2 1835 Replacement Battery 11.36V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMicrosoft Surface Book 2 1835 13.5\" Tablet Keyboard — 11.36V Li-Polymer Replacement Battery (G3HTA050H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.36V, 5000mAh (56.8Wh) Li-Polymer battery replaces the OEM cell in the detachable keyboard base of the Microsoft Surface Book 2 1835 13.5\". It restores power to the keyboard dock, maintaining wireless input and charging pass-through when the tablet screen is separated from the base. OEM part numbers G3HTA050H and G3HTA049H both apply to this configuration.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSurface Book 2 1835 keyboard base fitment:\u003c\/strong\u003e\n    The 13.5\" Surface Book 2 keyboard base uses a dedicated battery separate from the tablet display unit. This cell sits in the hinge base and supports the docking rail voltage handshake — the tablet draws from both units when docked, so a dead base battery affects overall system charge distribution.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the keyboard base, confirming the BMS communicates correctly with the Surface firmware. Charge acceptance, cutoff thresholds, and dock-rail handshake all responded as expected with no fault codes triggered.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after installation:\u003c\/strong\u003e\n    After fitting this battery, run the base down to automatic shutoff, then charge uninterrupted to 100%. The fuel gauge IC calibrates against the new cell during this first full cycle, which corrects the inaccurate percentage readings that commonly appear immediately 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 2 base shows a different charge level than the tablet display unit\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Surface Book 2 runs two independent battery circuits — one in the tablet display and one in the keyboard base. Windows reports a combined percentage, but each cell has its own state of charge. A degraded or replaced base battery will skew the combined reading noticeably. After swapping the base cell, the reported percentage can look off by 10–20% until the fuel gauge IC has completed one full calibration cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSurface Book 2 shutting down while docked with charge showing above 15%\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the base battery voltage drops below the BMS cutoff threshold under combined load — keyboard backlight, USB-A ports, and charging current to the tablet display all draw from the base cell simultaneously. A cell with degraded capacity hits this voltage cliff faster than the fuel gauge predicts, causing a sudden shutdown before the percentage reaches zero. Replacing the base battery resolves the issue if the display unit cell tests healthy. After installation, confirm the base charges to a steady 11.36V at full capacity before docking under heavy load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425835712602,"sku":"BWCS-MIS218SL-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425835745370,"sku":"BWCS-MIS218SL-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425835778138,"sku":"BWCS-MIS218SL-3","price":121.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MIS218SL-1.webp?v=1779929929","url":"https:\/\/batteryweb.com\/products\/microsoft-surface-book-2-1835-135-tablet-keyboard-replacement-battery-1136v-5000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}