{"product_id":"datron-u100-replacement-battery-111v-4400mah-li-ion","title":"Datron U100 Compatible Battery 11.1V 4400mAh BTY-S11","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDatron U100 — 11.1V Li-ion Replacement Battery (BTY-S11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion battery for the Datron U100 notebook computer. It replaces the original BTY-S11 cell when the laptop no longer holds a usable charge away from mains power. Install it when the existing cell degrades, swells, or stops charging altogether.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eU100 platform fit:\u003c\/strong\u003e\n    The U100 uses a fixed 11.1V three-cell series configuration with a specific connector pinout and BMS handshake tied to the BTY-S11 part number. Any replacement cell must match that voltage rail and communicate correctly with the mainboard's charge controller — mismatched cells trigger an immediate charge block.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and controlled discharge on the U100 platform. The BMS negotiated correctly with the mainboard charge IC, reported state-of-charge accurately after the first full cycle, and held voltage above the cutoff threshold under CPU and display load combined.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the U100:\u003c\/strong\u003e\n    After fitting this cell, run the laptop down to hibernate cutoff — do not force-shutdown — then charge uninterrupted to 100%. This single discharge-to-charge cycle resets the BIOS battery learn routine and clears the inaccurate health warning that appears after every cell swap on the U100.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the U100 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe U100's fuel gauge IC calibrated its discharge curve against the old cell's internal resistance profile. A new cell has lower resistance, so the voltage-to-capacity mapping is wrong at the start. Under combined CPU and display load, the IC reads a voltage dip as a critical low-battery event and cuts power — even though the cell still has usable capacity. Run two full discharge-to-charge cycles and the fuel gauge IC re-learns the new cell's curve. Shutdowns at false percentages typically stop after cycle two.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"unknown\" after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data from the battery's EEPROM, which still carries wear metrics written by the previous cell. A fresh BTY-S11 replacement presents new EEPROM values that don't match the historical charge cycle count stored in the BIOS — this mismatch triggers the health warning. It is not a fault with the replacement cell. Enter the BIOS battery learn cycle by discharging fully to hibernate cutoff, then charging to 100% without interruption, and the health status will update to reflect the new cell's actual condition.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410826002522,"sku":"BWCS-MSU100HB-1","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410826035290,"sku":"BWCS-MSU100HB-2","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410826068058,"sku":"BWCS-MSU100HB-3","price":116.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MSU100HB-1.webp?v=1779581287","url":"https:\/\/batteryweb.com\/products\/datron-u100-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}