{"product_id":"seanix-seanote-sn238-replacement-battery-111v-4400mah-li-ion","title":"Seanix SeaNote SN238 Replacement Battery 11.1V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSeanix SeaNote SN238 \/ SN238A-1 — 11.1V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 4400mAh (48.84Wh) lithium-ion battery for the Seanix SeaNote SN238 and SeaNote SN238A-1 notebooks. It replaces the original cell when the laptop no longer holds a charge or fails to power on without AC. Voltage, connector, and BMS handshake match the original specification for both models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSN238 and SN238A-1 compatibility:\u003c\/strong\u003e\n    Both models share the same 11.1V battery bay, connector pinout, and BMS communication protocol. A single replacement cell covers either variant without modification.\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 BMS cutoff on the SN238 platform. The protection circuit engaged correctly at low-voltage threshold and the charge IC accepted a full charge cycle without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation calibration:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate-cutoff then charge uninterrupted to 100%. This resets the BIOS battery learn cycle 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 SeaNote SN238 BIOS reads health data from EEPROM registers on the battery's protection board. When a new cell goes in, those registers still reflect the charge history and degradation profile of the old pack. The BIOS compares current readings against stored values and flags the result as poor health even though the cell is new. One full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite the learn cycle against the new cell's actual capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSeaNote SN238 shutting down at 20–30% battery 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 voltage curve. The OS displays a percentage based on stale reference data, so the reported figure and actual cell voltage are out of sync. Under full CPU and display load, the cell voltage drops faster than the gauge predicts, hitting the BMS low-voltage cutoff while the screen still shows charge remaining. Run two to three full discharge-and-charge cycles to let the fuel gauge IC re-anchor its reference points — shutdowns should stop once the gauge tracks real cell voltage accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410852937818,"sku":"BWCS-AUF3NB-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410852970586,"sku":"BWCS-AUF3NB-2","price":86.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410853003354,"sku":"BWCS-AUF3NB-3","price":95.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF3NB-1.webp?v=1779581357","url":"https:\/\/batteryweb.com\/products\/seanix-seanote-sn238-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}