{"product_id":"onn-surf-y1333w-replacement-battery-76v-6000mah-li-polymer","title":"ONN Surf Y1333W Replacement Battery 7.6V 6000mAh UTL-4766133","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eONN Surf Y1333W \/ WU133W \/ K1412W — 7.6V Li-Polymer Replacement Battery (UTL-4766133)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 6000mAh (45.6Wh) lithium-polymer replacement battery for the ONN Surf Y1333W tablet and compatible models including WU133W, K1412W, and 100002434. It replaces OEM part UTL-4766133. The battery connects to the tablet's main board and powers the display, processor, and system logic during portable use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eY1333W, WU133W, K1412W, 100002434 compatibility:\u003c\/strong\u003e\n    These models share the same 7.6V power rail, connector pinout, and BMS handshake protocol — one cell fits all four variants without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Y1333W platform. The BMS accepted the new cell without fault codes, and the fuel gauge IC tracked state-of-charge accurately after two calibration cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration on the Y1333W:\u003c\/strong\u003e\n    After installation, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the tablet's battery learn cycle and clears the inaccurate health warning the firmware posts after every cell 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 Y1333W shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on this tablet maps voltage curves from the old cell's EEPROM data. A new cell has a different voltage-to-capacity profile, so the gauge reads the cliff incorrectly and triggers shutdown well above true empty. Under combined CPU and display load, the new cell's voltage drops faster than the stale curve predicts. Running two full discharge-to-hibernate then full-charge cycles overwrites the learned curve and brings the cutoff back to the correct threshold near 3.0V per cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTablet shows 0% or \"unknown battery\" immediately after installing the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the firmware is still reading EEPROM data written by the original cell — the new cell's identification registers haven't been accepted yet. The tablet hasn't faulted; it just hasn't completed a handshake with the replacement. Power the tablet on with the charger connected and let it sit at the charging screen for 10 minutes before booting into the OS. After one complete charge cycle, the fuel gauge IC re-initialises and the percentage display returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409565679706,"sku":"BWCS-EMK110NB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409565712474,"sku":"BWCS-EMK110NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409565745242,"sku":"BWCS-EMK110NB-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EMK110NB-1.webp?v=1779580013","url":"https:\/\/batteryweb.com\/products\/onn-surf-y1333w-replacement-battery-76v-6000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}