{"product_id":"samsung-galaxy-j-replacement-battery-38v-2600mah-li-ion","title":"Samsung Galaxy J B605BA Replacement Battery 3.8V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy J \/ SGH-N075T — 3.8V Li-ion Replacement Battery (B605BA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2600mAh (9.88Wh) Li-ion replacement battery for the Samsung Galaxy J and SGH-N075T. It fits where OEM part numbers B605BA, B605BK, and B605BU originally shipped. If the original cell has degraded or no longer holds a usable charge, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGalaxy J \/ SGH-N075T platform fit:\u003c\/strong\u003e\n    Both models share the same 3.8V battery bay, connector pinout, and BMS handshake protocol. One cell covers both — no adapter, no rewiring.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle on the SGH-N075T and confirmed the BMS accepted the charge IC handshake without fault codes. The cell held 3.8V nominal under display and modem load with no mid-cycle cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge calibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge down to auto-shutoff, then charge to 100% uninterrupted. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging loads are applied to an uncalibrated cell.\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 J after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity problem. When the modem fires during a call or the display peaks in brightness, current draw spikes hard. A new cell with an uncalibrated fuel gauge IC can't map that draw accurately, so the phone sees a voltage dip the OS interprets as empty and shuts down — even though charge remains in the cell. Running one full discharge-to-shutoff cycle, then a full uninterrupted charge, gives the coulomb counter a clean baseline. After that calibration cycle, the reported percentage tracks actual cell voltage accurately under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on first cycle after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's fast charge handshake requires the charge IC to validate the cell's BMS response before it steps up current. On the first cycle with a new cell, the BMS may present a higher internal impedance than the IC expects — so the charger falls back to standard 5V\/1A rather than triggering the fast charge protocol. This isn't a faulty battery or a faulty charger. Complete one full standard charge cycle first. On the second cycle, the impedance drops into range and the fast charge protocol activates normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404292915290,"sku":"BWCS-SMN075XL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404292948058,"sku":"BWCS-SMN075XL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404292980826,"sku":"BWCS-SMN075XL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMN075XL-1.webp?v=1779369658","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-j-replacement-battery-38v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}