{"product_id":"artfone-c3-replacement-battery-37v-900mah-li-ion","title":"Artfone C3 Replacement Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eArtfone C3 \/ CF241A \/ CS181 Series — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh Li-ion cell for the Artfone C3, CF241A, CS181, and CS181A handsets. These are senior-focused mobile phones with large buttons and a straightforward calling interface. The battery slots into the same compartment as the original and uses the same connector pinout.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC3 \/ CF241A \/ CS181 platform fit:\u003c\/strong\u003e\n    All four models in this family share the same battery bay dimensions (53.00 × 34.00 × 4.30mm), the same 3.7V charge voltage, and the same three-pin connector. One replacement cell covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full discharge-charge sequence on the C3 handset. The onboard charge IC accepted the cell immediately, BMS protection trips functioned correctly at the low-voltage cutoff, and the fuel gauge initialised without errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting, let the phone discharge fully until it powers off on its own, then charge uninterrupted to 100%. This gives the fuel gauge IC one complete reference cycle against the new cell's actual discharge curve before the percentage readout becomes trustworthy.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the C3 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Artfone C3 uses a simple fuel gauge IC that tracks charge state by measuring voltage against a stored discharge curve calibrated to the original cell. A new cell has a slightly different internal resistance profile, so the IC's voltage-to-percentage mapping is off from the start. The displayed percentage can read 40% while the actual remaining capacity is much lower or higher. One full discharge-to-cutoff followed by an uninterrupted charge to 4.2V resets the reference and brings the readout back into line.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff — not a fault with the cell itself. Under the load of an active call, the modem draws a short burst of current that the uncalibrated gauge cannot predict. The cell voltage drops below the BMS protection threshold before the percentage counter catches up, and the phone cuts out. It typically happens before the first full recalibration cycle is complete. Run one complete discharge-charge cycle and the gauge learns the real voltage curve; the early shutdowns stop once it knows where the cliff actually sits.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404330106970,"sku":"BWCS-EAC140SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404330139738,"sku":"BWCS-EAC140SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404330172506,"sku":"BWCS-EAC140SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EAC140SL-1.webp?v=1779369761","url":"https:\/\/batteryweb.com\/products\/artfone-c3-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}