{"product_id":"samsung-galaxy-j1-replacement-battery-385v-1850mah-li-ion","title":"Samsung Galaxy J1 EB-BJ100CBE Replacement Battery 3.85V 1850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy J1 \/ SM-J100F Series — 3.85V Li-ion Replacement Battery (EB-BJ100CBE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 1850mAh Li-ion cell for the Samsung Galaxy J1 and Galaxy J1 4G smartphones, including SM-J100F and SM-J100FN variants. It replaces OEM part numbers EB-BJ100CBE, EB-BJ100CBZ, EB-BJ100BCE, and GH43-04412A. Install it when the original cell no longer holds enough charge to keep the phone through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGalaxy J1 SM-J100 platform fit:\u003c\/strong\u003e\n    These J1 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 55.00 × 48.50 × 5.10mm cell geometry and NTC thermistor line are consistent across the SM-J100 board revision, so one SKU covers the full range listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an SM-J100F unit and confirmed the BMS accepted the charge cycle without fault flags. The protection circuit responded correctly to low-voltage cutoff and the charge IC recognised the NTC signal without triggering a temperature error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Galaxy J1 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a faulty cell. Under modem transmission bursts or screen-at-full-brightness loads, the J1's SoC demands short current spikes the fuel gauge IC cannot predict from a freshly installed cell. The gauge reports 25% remaining, but the cell voltage drops below the SoC's minimum rail faster than the counter expects, and the phone shuts off as a protection response. One full discharge-charge cycle at standard rate lets the coulomb counter recalibrate against the actual discharge curve of the new cell, and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS showing wrong battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Galaxy J1 stores its fuel gauge calibration data against the old cell's internal resistance profile. When a new cell goes in, the coulomb counter is still reading against that old model, which causes the percentage display to jump or stall — commonly freezing near 50% or reading 100% while the phone is still charging. This is not a hardware fault. Drain the phone fully until it powers off on its own, then charge uninterrupted to 100% at standard rate. After one complete cycle, the fuel gauge IC writes a new baseline and the percentage display stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392039977050,"sku":"BWCS-SMJ100SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392040009818,"sku":"BWCS-SMJ100SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392040042586,"sku":"BWCS-SMJ100SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMJ100SL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-j1-replacement-battery-385v-1850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}