{"product_id":"att-maven-replacement-battery-38v-2000mah-li-polymer","title":"AT\u0026T Maven 3.8V Replacement Battery 2000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T Maven \/ Maven 4G — 3.8V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2000mAh (7.6Wh) lithium-polymer cell built to fit the AT\u0026amp;T Maven and Maven 4G smartphones. It replaces the original battery when capacity has dropped, the phone shuts down unexpectedly, or the cell no longer holds a useful charge. Physical dimensions are 88.91 × 34.73 × 4.25mm — confirm these against your original before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaven and Maven 4G compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and 3.8V nominal voltage rail. A single 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 the cell through charge and discharge on a calibrated rig, confirming BMS cutoff behaviour at low-voltage threshold and stable voltage delivery under modem-load simulation across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the phone's fuel gauge IC a complete reference curve against the new cell before it starts reporting reliable percentages.\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 problem, not a capacity problem. At 20–30% state-of-charge, the new cell's voltage drops under modem or screen load faster than the old degraded cell the fuel gauge IC was calibrated to. The phone's power IC interprets the voltage sag as a critical low-battery event and triggers an immediate shutdown. One full discharge-to-shutdown followed by a full uninterrupted charge resets the coulomb counter reference and typically resolves the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the battery sat discharged in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells that drop below approximately 2.5V per cell trigger a BMS lockout to prevent damage from deep discharge. If the Maven won't respond to the power button after sitting unused, connect it to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing anything. The charge IC will trickle current into the cell until voltage recovers above the BMS re-enable threshold, at which point the phone will begin a normal boot cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404235800666,"sku":"BWCS-ZTQ505SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404235833434,"sku":"BWCS-ZTQ505SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404235866202,"sku":"BWCS-ZTQ505SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTQ505SL-1.webp?v=1779369465","url":"https:\/\/batteryweb.com\/products\/att-maven-replacement-battery-38v-2000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}