{"product_id":"motorola-razr-2019-replacement-battery-38v-1100mah-li-polymer","title":"Motorola Razr 2019 KV30 Replacement Battery 3.8V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola Razr 2019 — 3.8V Li-Polymer Replacement Battery (KV30)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 1100mAh Li-Polymer replacement battery for the Motorola Razr 2019 foldable smartphone. It fits the XT2000-1, XT2000-2, and XT2000 variants. Install it when the original cell no longer holds a charge or fails to power the device through normal use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRazr 2019 foldable platform (XT2000 series):\u003c\/strong\u003e\n    The XT2000-1, XT2000-2, and XT2000 variants share the same battery bay geometry, connector pinout, and BMS handshake protocol. This cell matches the OEM form factor at 61.36 × 52.50 × 2.60mm — critical in a folding chassis where even 0.1mm clearance matters.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Razr 2019 unit, monitoring BMS communication, charge acceptance, and cutoff behaviour across multiple full discharge-charge cycles. The BMS handshake initialised correctly and charge termination triggered at the expected voltage ceiling.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — reducing erratic percentage readings early on.\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 Razr 2019 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Razr 2019's fuel gauge IC builds a discharge model based on the original cell's internal resistance curve. A new cell has a different impedance profile, so the IC miscalculates the remaining capacity. Under modem load or screen-on draw, the actual cell voltage drops below the shutdown threshold while the OS still shows 20–30%. The fix is one full discharge to near-zero followed by a complete charge — this forces the coulomb counter to reset its baseline against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not working on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first insertion, the charge IC may not negotiate fast charge protocols with an uncalibrated BMS — the phone defaults to standard 5V charging as a safety fallback. This is normal behaviour on the first cycle. Complete one full slow charge to 100%, then disconnect and allow normal use. Fast charge negotiation typically resumes from the second cycle onward once the BMS has logged a complete charge event.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391872041050,"sku":"BWCS-MXT200SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391872073818,"sku":"BWCS-MXT200SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391872106586,"sku":"BWCS-MXT200SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MXT200SL-1.webp?v=1779142413","url":"https:\/\/batteryweb.com\/products\/motorola-razr-2019-replacement-battery-38v-1100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}