{"product_id":"coolpad-cool-1-replacement-battery-385v-3900mah-li-polymer","title":"Coolpad Cool 1 CPLD-403 Replacement Battery 3.85V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCoolpad Cool 1 \/ C106 — 3.85V Li-Polymer Replacement Battery (CPLD-403)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3900mAh Li-Polymer replacement battery for the Coolpad Cool 1 and C106 smartphones. It replaces OEM part number CPLD-403. Fit this battery when the original cell can no longer hold a consistent charge or shuts the phone down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCool 1 and C106 compatibility:\u003c\/strong\u003e\n    Both models run the same CPLD-403 cell with identical connector pinout, voltage rail, and BMS handshake. The same physical dimensions — 80.60 x 62.10 x 4.44mm — mean no case stress or flex cable tension on installation.\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 a Cool 1 unit. The BMS accepted charge from both standard and fast-charge adapters. Voltage held at 3.85V nominal with no thermal events during cycling.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging for the first complete discharge-charge cycle. This gives the fuel gauge IC time to map its coulomb counter against the new cell's discharge curve before high-current charging begins on 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 Cool 1 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Cool 1's fuel gauge IC retains the discharge curve of the old, degraded cell after replacement. When a fresh cell hits the voltage range the IC previously associated with a low or failing cell, it signals a forced shutdown. This is not a fault with the new battery — it is a calibration mismatch. One full discharge down to auto-off, followed by an uninterrupted charge to 100%, resets the IC's reference curve and corrects the cutoff point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not recognised on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle after fitting a new CPLD-403, the charge IC may fall back to standard 5V charging and ignore the fast-charge handshake. This happens because the BMS on a new cell starts in a conservative state until it confirms a complete charge cycle without fault. Let the first charge complete fully at standard rate. Fast charge protocol should resume normally from the second cycle onward without any further intervention.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392032931930,"sku":"BWCS-CPD403SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392032964698,"sku":"BWCS-CPD403SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392032997466,"sku":"BWCS-CPD403SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPD403SL-1.webp?v=1779143030","url":"https:\/\/batteryweb.com\/products\/coolpad-cool-1-replacement-battery-385v-3900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}