{"product_id":"lg-vx1-replacement-battery-37v-1000mah-li-ion","title":"LG VX1 Replacement Battery 3.7V 1000mAh Li-ion LGLI-AATM","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLG VX1 \/ TM520 Series — 3.7V Li-ion Replacement Battery (LGLI-AATM)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion battery that replaces the original LGLI-AATM cell. It fits the LG VX1, VX10, TM520, and TM525 mobile phones. Capacity is rated at 1000mAh (3.7Wh) — matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVX1, VX10, TM520, TM525 compatibility:\u003c\/strong\u003e\n    These four models share the same battery bay dimensions, 3.7V single-cell architecture, and connector pinout. The LGLI-AATM form factor fits all four without modification.\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 the TM520 platform. The BMS accepted the cell without error flags, and the charge IC completed a full cycle without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable any fast-charge mode for the first complete discharge-charge cycle after installation. This allows the fuel gauge IC to recalibrate its discharge curve against the new cell before high-current charging is 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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue. Under load — modem transmission bursts or screen-on current — the new cell's voltage drops sharply before the fuel gauge IC registers a low-battery state. The phone shuts down because actual cell voltage collapses below the cutoff threshold, even though the reported percentage looks acceptable. Run one full discharge to near-zero, then a full charge to 100% without interruption. After that cycle the fuel gauge IC maps the real discharge curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells in storage self-discharge over time. If the cell drops below approximately 2.5V, the BMS enters a lockout state and the phone will not power on or show a charge indicator. Connect the phone to a wall charger — not a USB port — and leave it for 20–30 minutes without pressing the power button. The charger trickle-feeds current at a safe rate until the cell climbs above the BMS re-enable threshold, at which point normal charging resumes. Target at least 3.0V before attempting to power on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409445879898,"sku":"BWCS-LTM520SL-1","price":22.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409445912666,"sku":"BWCS-LTM520SL-2","price":25.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409445945434,"sku":"BWCS-LTM520SL-3","price":27.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LTM520SL-big.webp?v=1779579708","url":"https:\/\/batteryweb.com\/products\/lg-vx1-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}