{"product_id":"clevo-2820-replacement-battery-148v-3600mah-li-ion","title":"Clevo 2820 Notebook Compatible Battery 14.8V 3600mAh XLB0034","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClevo 2820 \/ 2830 \/ 2850 — 14.8V Li-ion Replacement Battery (XLB0034)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 3600mAh (53.28Wh) lithium-ion battery for the Clevo 2820, 2830, and 2850 notebook series. It replaces OEM part number XLB0034. If your original cell no longer holds charge or the laptop drops off battery immediately, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2820, 2830, and 2850 compatibility:\u003c\/strong\u003e\n    All three models share the same 14.8V four-cell architecture, the same connector pinout, and the same BMS handshake protocol — which is why a single cell covers the whole group without 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, discharge, and BMS communication checks. The protection circuit responded correctly to over-voltage and under-voltage thresholds, and the pack reported state-of-charge cleanly to the host system.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Clevo notebooks:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate-cutoff on battery only, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears 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\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Clevo BIOS stores battery health data in EEPROM and compares it against the previous cell's charge history. When a new cell goes in, the EEPROM data no longer matches the actual chemistry, so the system flags the battery as degraded before it has ever cycled. This is a firmware read error, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn cycle and resolves the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down hard at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge still maps percentage readings to the old cell's profile, so what shows as 25% is already at or below the BMS low-voltage cutoff — typically around 10.8V for a four-cell 14.8V pack. The BMS triggers a hard shutdown to protect the cells before the OS can log the event. Complete two full discharge-and-charge cycles to let the fuel gauge IC resample the new cell's curve and restore accurate percentage readings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410833244250,"sku":"BWCS-CLN28NB-1","price":99.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410833277018,"sku":"BWCS-CLN28NB-2","price":117.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410833309786,"sku":"BWCS-CLN28NB-3","price":130.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLN28NB-big.webp?v=1779581320","url":"https:\/\/batteryweb.com\/products\/clevo-2820-replacement-battery-148v-3600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}