{"product_id":"samsung-sm-g3139d-replacement-battery-38v-1550mah-li-ion","title":"EB-BG319ABC Samsung Galaxy Core Plus Replacement Battery 3.8V 1550mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Ace 4 \/ SM-G3139D — 3.8V Li-ion Replacement Battery (EB-BG319ABC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 1550mAh Li-ion replacement battery for the Samsung SM-G3139D, Galaxy Ace 4 CDMA, SM-G310A, and Galaxy Ace 4 LTE. It uses OEM part number EB-BG319ABC and fits directly into the original battery slot. Swap it in when the existing cell no longer holds a usable charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAce 4 platform compatibility:\u003c\/strong\u003e\n    The SM-G3139D, SM-G310A, and Ace 4 LTE all share the same battery bay dimensions and connector pinout. The EB-BG319ABC cell fits all of them because Samsung used a single battery spec across that Ace 4 lineup — same voltage rail, same BMS handshake protocol.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an SM-G310A unit. The BMS accepted the cell without fault flags, completed full charge termination at 4.35V, and held stable voltage under simultaneous LTE data and screen-on load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle after fitting this cell. The fuel gauge IC on these Ace 4 devices recalibrates its discharge curve during that first cycle. Running fast charge before recalibration pushes high current into an uncalibrated cell and skews percentage readings for days.\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 SM-G3139D after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Ace 4 fuel gauge IC stores a discharge curve from the old cell. When a new cell goes in, that stored curve no longer matches the actual voltage profile of the replacement. At 20–30% indicated charge, the new cell's voltage drops sharply under modem and display load — faster than the IC predicts. The phone interprets this as an immediate undervoltage condition and shuts down to protect the circuit. One full slow-charge discharge cycle overwrites the stored curve and brings reported percentage back in line with actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSM-G3139D not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the EB-BG319ABC cell dropped below approximately 2.5V per cell during shipping or storage, the BMS enters a lockout state to prevent damage. The phone will show no response — no charging indicator, no boot. Connect the phone to a wall charger rated at least 5V\/1A and leave it for 20–30 minutes without pressing the power button. The BMS trickle-charges the cell back above its recovery threshold before allowing normal charging to resume.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404146049114,"sku":"BWCS-SMG319SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404146081882,"sku":"BWCS-SMG319SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404146114650,"sku":"BWCS-SMG319SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMG319SL-1.webp?v=1779369094","url":"https:\/\/batteryweb.com\/products\/samsung-sm-g3139d-replacement-battery-38v-1550mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}