{"product_id":"lenovo-tab4-8-replacement-battery-385v-4750mah-li-polymer","title":"Lenovo Tab4 8 Replacement Battery L16D1P34 3.85V 4750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLenovo Tab4 8 Series — 3.85V Li-Polymer Replacement Battery (L16D1P34)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4750mAh Li-Polymer replacement battery for the Lenovo Tab4 8 and Tab4 8 Plus tablets. It fits models TB-8704X and TB-8504X, among others. It replaces OEM part number L16D1P34 directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTab4 8 and 8 Plus platform fit:\u003c\/strong\u003e\n    Both the standard Tab4 8 and the 8 Plus share the same battery bay dimensions, voltage rail, and connector pinout. The L16D1P34 part number covers both variants, so one SKU covers the full platform without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on a TB-8504X unit. The BMS accepted charge from the first cycle, voltage held steady across the display and Wi-Fi load combined, and no overcurrent trip was triggered during start-up draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after installation:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff once, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that 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\"\u003eTablet shutting down between 15–25% after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage-to-capacity curve. When the display and Wi-Fi draw current simultaneously, voltage dips sharply in the 15–25% range. The IC reads that dip as a critically low cell voltage and triggers an emergency shutdown. One full discharge-to-shutoff cycle followed by a complete charge resets the calibration. After that cycle, the tablet should reach below 10% before any shutoff occurs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging unavailable after swapping the L16D1P34\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFast charge on the Tab4 8 platform depends on a successful USB-PD or proprietary charge protocol handshake between the charger and the charge IC on the new cell. On first connection, the IC may default to standard 5V charging while it completes the negotiation. Disconnect and reconnect the charger after the tablet has been on charge for two to three minutes. If fast charge still does not activate, complete one full charge cycle — the protocol is accepted reliably from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425840693338,"sku":"BWCS-LVT480SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425840726106,"sku":"BWCS-LVT480SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425840758874,"sku":"BWCS-LVT480SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LVT480SL-1.webp?v=1779929951","url":"https:\/\/batteryweb.com\/products\/lenovo-tab4-8-replacement-battery-385v-4750mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}