{"product_id":"vodafone-888n-replacement-battery-37v-1800mah-li-ion","title":"Vodafone 888N Compatible Battery 3.7V 1800mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVodafone 888N \/ Smart 4 Series — 3.7V Li-ion Replacement Battery (CPLD-315)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1800mAh Li-ion replacement battery for the Vodafone 888N, 889N, 890N, and Smart 4 series smartphones. OEM part number CPLD-315. It physically matches the original cell at 60.70 × 56.25 × 5.20mm and connects to the same board-side connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e888N \/ 889N \/ 890N and Smart 4 compatibility:\u003c\/strong\u003e\n    These models share the same voltage rail, connector pinout, and BMS handshake protocol. All run a 3.7V nominal Li-ion cell at this physical footprint, so one cell revision covers the full lineup without modification.\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 and charge sequence on a 888N unit. The BMS accepted the new cell, balancing started within the first charge cycle, and the charge IC held the correct 4.2V cutoff at full capacity.\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 complete one full discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging is introduced 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 Vodafone 888N after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still reading the old cell's discharge curve. The new cell hits a voltage cliff — often around 3.5V under modem or screen load — before the gauge reaches 0%. The phone interprets the voltage drop as an immediate low-battery shutdown rather than a gradual drain. One full discharge-to-zero and recharge cycle forces the coulomb counter to recalibrate against the actual new cell behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting incorrect battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Android fuel gauge IC on the 888N stores learned capacity data from the old cell in firmware registers. When a new cell goes in, those stored values no longer match actual cell chemistry, so reported percentage drifts — jumping erratically or freezing at a fixed value. Drain the phone completely until it shuts down automatically, then charge uninterrupted to 100% without interruption. After one complete cycle, the fuel gauge resets its baseline to the new cell's actual full-charge voltage of 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404219482202,"sku":"BWCS-CPD886SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404219514970,"sku":"BWCS-CPD886SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404219547738,"sku":"BWCS-CPD886SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPD886SL-1.webp?v=1779369390","url":"https:\/\/batteryweb.com\/products\/vodafone-888n-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}