{"product_id":"kurio-7s-replacement-battery-37v-4000mah-li-polymer","title":"KURIO 7S Tablet Compatible Battery 3.7V 4000mAh Li-Polymer PL458097","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKURIO 7S \/ C1300 — 3.7V Li-Polymer Replacement Battery (PL458097)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 4000mAh Li-Polymer battery for the KURIO 7S and C1300 kids' tablets. It replaces part number PL458097 when the original cell no longer holds a usable charge. Dimensions are 99.15 × 79.55 × 4.20 mm — measure your existing cell before ordering to confirm fitment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7S and C1300 compatibility:\u003c\/strong\u003e\n    Both tablets share the same mainboard revision and battery bay dimensions, so a single cell covers both. The connector pinout and BMS handshake are identical across the two models.\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 a KURIO mainboard. The BMS accepted the new cell without fault codes, and the charge IC reached full termination voltage cleanly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff once, then charge uninterrupted to 100%. This recalibrates the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that typically appear straight 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 at 15–25% after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a fuel gauge calibration problem, not a faulty cell. The fuel gauge IC was trained on the old cell's discharge curve. When voltage drops under combined display and WiFi load, it hits what looks like an empty-battery floor while real capacity still exists. Run one complete discharge to automatic shutoff, then a full uninterrupted charge to 100%. After that cycle, the IC remaps its low-voltage threshold to the new cell and the phantom shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKURIO tablet showing wrong battery percentage after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe percentage is calculated by a fuel gauge IC on the board, not the battery itself. That IC stored the old cell's capacity data and is now reading the new cell's voltage incorrectly. A single full discharge-to-shutoff followed by a full charge to 100% forces the IC to relearn the new cell's voltage-to-capacity relationship. After that cycle, percentage readings stabilise and track normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425962852442,"sku":"BWCS-KUC130SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425962885210,"sku":"BWCS-KUC130SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425962917978,"sku":"BWCS-KUC130SL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KUC130SL-1.webp?v=1779930008","url":"https:\/\/batteryweb.com\/products\/kurio-7s-replacement-battery-37v-4000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}