{"product_id":"coolpad-8017-replacement-battery-37v-1500mah-li-ion","title":"Coolpad 8017 Replacement Battery CPLD-127 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCoolpad 8017 — 3.7V Li-ion Replacement Battery (CPLD-127)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion replacement battery for the Coolpad 8017 smartphone. It carries OEM part number CPLD-127 and fits the 8017 directly. Voltage and capacity match the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoolpad 8017 fitment:\u003c\/strong\u003e\n    The 8017 uses a specific connector pinout and BMS handshake tied to the CPLD-127 cell. This replacement matches that pinout, so the charge IC and fuel gauge IC communicate correctly without throwing a fault state.\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 bench. The BMS held within the expected cutoff range — no premature high-voltage cutoff, no undervoltage lockout tripping before the cell was genuinely depleted.\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 full 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 pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Coolpad 8017 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 8017's fuel gauge IC builds its percentage model from learned discharge data on the previous cell. When a new cell goes in, that learned curve no longer matches the actual cell chemistry. The IC is still reading against old reference points, so it shows incorrect percentages. One complete discharge down to auto-shutoff followed by a full uninterrupted charge to 100% resets the coulomb counter and lets the IC relearn the new curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — typically during a call, GPS fix, or screen-on burst — even though the reported percentage still looks acceptable. The fuel gauge IC hasn't yet correlated that percentage reading to the actual voltage floor of the new cell. Under modem or display load, the cell dips below the BMS cutoff threshold before the OS has time to react. Run one full calibration cycle first, and confirm the cell rests at approximately 3.7V when fully charged and unplugged.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404146442330,"sku":"BWCS-CPD127SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404146475098,"sku":"BWCS-CPD127SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404146507866,"sku":"BWCS-CPD127SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPD127SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/coolpad-8017-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}