{"product_id":"socketmobile-sonim-xp1-replacement-battery-37v-1100mah-li-ion","title":"Socketmobile Sonim XP1 Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSocketmobile Sonim XP1 Series — 3.7V Li-ion Replacement Battery (XP1-0001100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion cell rated at 1100mAh (4.07Wh), built to the same spec as OEM part XP1-0001100. It fits the Sonim XP1, Sonim XP1 BT, and Sonim XP3 Enduro — three rugged smartphones built for industrial field use. Voltage and capacity match the original, so the phone's charge IC sees no mismatch on installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXP1, XP1 BT, and XP3 Enduro compatibility:\u003c\/strong\u003e\n    All three models share the same 3.7V battery bay, connector pinout, and BMS handshake requirements. One cell covers the full platform — no model-specific variants needed.\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 the XP1 platform. The BMS accepted the cell without fault flags, and the charge IC completed a full CC-CV cycle to rated capacity.\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 and run one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve 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 Sonim XP1 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still using the discharge curve it learned from the old, degraded cell. The new cell has a steeper voltage cliff at low charge states, and the modem or screen load pulls the cell voltage below the BMS cutoff threshold before the OS reads 0%. The phone shuts off not because the cell is empty, but because the gauge is miscalibrated. Run one full discharge to auto-off, then charge uninterrupted to 100% — after that cycle, the gauge recalibrates and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS showing wrong battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAndroid's battery percentage reads from the fuel gauge IC, which tracks charge using a coulomb counter calibrated to the previous cell's internal resistance and capacity curve. A new cell with different impedance throws the counter off immediately. The gauge reports whatever value its stale model predicts, not what the cell actually holds. One full discharge-to-cutoff followed by a full uninterrupted charge resets the learned curve — after that cycle, percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405145702490,"sku":"BWCS-SXP1SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405145735258,"sku":"BWCS-SXP1SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405145768026,"sku":"BWCS-SXP1SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SXP1SL-1.webp?v=1779370279","url":"https:\/\/batteryweb.com\/products\/socketmobile-sonim-xp1-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}