{"product_id":"uscellular-mwp3505-replacement-battery-38v-1950mah-li-ion","title":"USCellular MWP3505 Replacement Battery 3.8V 1950mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUSCellular MWP3505 \/ Render — 3.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 1950mAh (7.41Wh) Li-ion cell fits the USCellular MWP3505, MWP3505US, and Render smartphones. It replaces a degraded or failed original battery without replacing the handset. Voltage and form factor match the stock cell exactly — 56.00 x 55.50 x 5.00mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMWP3505, MWP3505US, and Render compatibility:\u003c\/strong\u003e\n    All three variants share the same 3.8V power rail, connector pinout, and BMS handshake protocol — one cell covers the full lineup without adapters or modifications.\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 MWP3505 platform. The BMS accepted the new cell without fault flags, and the charge IC completed a full cycle without thermal or current errors.\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 complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before it begins tracking percentage — skipping this step causes percentage jumps and early shutdown flags.\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 MWP3505 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MWP3505's fuel gauge IC retains the discharge curve from the old, degraded cell. When the new cell is installed, the IC misreads the voltage-capacity relationship and calls a low-voltage cutoff earlier than the true state of charge. The modem radio and display draw spike current at that point, pulling the cell voltage below the BMS floor momentarily — triggering a hard shutdown. One full uncalibrated discharge-charge cycle at standard current corrects the IC's curve and stops these early cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the replacement cell's first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first connection after a swap, the charge IC on the Render and MWP3505 runs a trickle pre-charge phase to verify cell health before stepping up to fast-charge current. A new cell at full voltage can confuse this handshake — the IC stays in pre-charge mode and the phone never signals fast charging. Disconnect the cable, power the phone off, reconnect, and let the IC re-enter its detection sequence from a cold start. If the issue persists after one full standard-rate cycle, verify the charge voltage is reaching 4.35V at the termination point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392105513050,"sku":"BWCS-ZTN860XL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392105545818,"sku":"BWCS-ZTN860XL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392105578586,"sku":"BWCS-ZTN860XL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTN860XL-1.webp?v=1779143816","url":"https:\/\/batteryweb.com\/products\/uscellular-mwp3505-replacement-battery-38v-1950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}