{"product_id":"samsung-sch-x319-replacement-battery-37v-900mah-li-ion","title":"Samsung SCH-X319 Replacement Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung SCH-X319 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh (3.33Wh) lithium-ion battery for the Samsung SCH-X319 flip phone. It replaces the original cell when the existing battery no longer holds a usable charge. Fits the SCH-X319 and X319 variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSCH-X319 platform fit:\u003c\/strong\u003e\n    The X319 uses a fixed 3.7V single-cell Li-ion bay with a three-contact connector. Both the SCH-X319 and X319 share the same physical bay dimensions and voltage rail, so this cell fits both 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 and discharge on a representative 3.7V single-cell platform. The BMS accepted charge from a standard 4.2V Li-ion charger and engaged cutoff correctly at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, run one complete discharge-charge cycle with fast charging disabled. The fuel gauge IC on the X319 calibrates its internal model against the cell's actual discharge curve — skipping this step leads to inaccurate percentage readings until the IC catches up.\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 replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe X319's fuel gauge IC retains the discharge curve from the old, degraded cell. A new cell has a steeper voltage cliff at lower states of charge than the worn cell the IC was tracking. When the phone draws current for a call or keypad backlight, voltage dips sharply at that uncalibrated threshold and the protection circuit interprets it as a undervoltage event. One full discharge-charge cycle — draining to auto-shutdown, then charging uninterrupted to 100% — resets the IC's reference curve and eliminates the false cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells discharged below roughly 2.5V trigger the BMS lockout, which blocks normal charging to prevent thermal runaway on a deeply depleted cell. A charger that starts at full current will be refused. To recover, connect the phone to a low-current USB source — a PC port rather than a wall adapter — and leave it untouched for 15–20 minutes. This allows the BMS to accept a trickle pre-charge that brings cell voltage back above the 2.9V re-enable threshold before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409457741914,"sku":"BWCS-SMX319SL-1","price":22.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409457774682,"sku":"BWCS-SMX319SL-2","price":25.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409457807450,"sku":"BWCS-SMX319SL-3","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMX319SL-big.webp?v=1779579767","url":"https:\/\/batteryweb.com\/products\/samsung-sch-x319-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}