{"product_id":"clevo-nl40mu-replacement-battery-114v-3150mah-li-polymer","title":"Clevo NL40BAT-3 11.4V Laptop Replacement Battery 3150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClevo NL40MU \/ NL41MU Series — 11.4V Li-Polymer Replacement Battery (NL40BAT-3)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 3150mAh (35.91Wh) Li-Polymer battery for Clevo NL40MU, NL40PU, NL41MU, NL41PU, and compatible NL-series notebook models. It replaces OEM part NL40BAT-3 and restores portable operation when the original cell no longer holds a usable charge. Voltage and connector match the original spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNL40 \/ NL41 platform compatibility:\u003c\/strong\u003e\n    The NL40 and NL41 share the same battery bay dimensions, three-cell 11.4V architecture, and BMS communication protocol. The NL40BAT-3 fits both MU and PU variants without modification because the connector pinout and charge termination handshake are identical across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full-load discharge, and re-charge on an NL40-series unit. The BMS negotiated charge termination correctly at 12.6V, and protection circuits tripped at the expected low-voltage cutoff without nuisance shutdowns under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Clevo NL-series:\u003c\/strong\u003e\n    After fitting, discharge the laptop under normal use until it hibernates on its own, then charge uninterrupted to 100% without using the machine. This resets the BIOS battery learn cycle and clears the inaccurate health or low-capacity warning that appears in BIOS and Windows 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 installing NL40BAT-3\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Clevo BIOS reads health data from EEPROM embedded in the battery pack, not from a live capacity measurement. When a new cell arrives, the EEPROM contains factory default values that do not match the laptop's stored wear history from the previous pack. BIOS interprets the mismatch as a degraded or unknown battery and flags it accordingly. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% — this forces a learn cycle that writes fresh data and clears the health warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down at 20–30% shown after battery swap\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 curve. The new Li-Polymer cell has a slightly different voltage-to-capacity profile, so the IC underestimates remaining charge and triggers a shutdown before the cell is actually empty. It is not a fault with the replacement battery. Complete two or three full discharge and charge cycles without interruption — after each cycle the fuel gauge IC recalibrates against the new cell's actual voltage curve, and the early shutdown point moves back toward 0%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409521016922,"sku":"BWCS-CLN510NB-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409521049690,"sku":"BWCS-CLN510NB-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409521082458,"sku":"BWCS-CLN510NB-3","price":122.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLN510NB_1.webp?v=1779579904","url":"https:\/\/batteryweb.com\/products\/clevo-nl40mu-replacement-battery-114v-3150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}