{"product_id":"coolpad-8810-replacement-battery-37v-1350mah-li-ion","title":"Coolpad 8810 Replacement Battery CPLD-65 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCoolpad 8810 — 3.7V Li-ion Replacement Battery (CPLD-65)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1350mAh Li-ion cell built to the CPLD-65 spec for the Coolpad 8810 smartphone. It replaces the original battery when capacity has dropped or the cell has failed entirely. Physical dimensions are 52.28 × 44.02 × 5.47mm — confirm clearance before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoolpad 8810 fit:\u003c\/strong\u003e\n    The 8810 uses the CPLD-65 footprint exclusively — same connector pinout, same BMS handshake voltage. No adaptation required at the board level.\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 8810 platform. The BMS accepted the full charge cycle without tripping, and the charge IC held stable current throughout.\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-to-charge cycle. This lets the fuel gauge IC map the new cell's 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 Coolpad 8810\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity problem. When the modem transmits or the screen peaks, the cell has to supply a current spike. If the cell's internal impedance is high — common on degraded originals — terminal voltage drops sharply under that load. The phone's protection circuit reads the voltage drop as a low-battery emergency and shuts down instantly. A new cell with lower impedance sustains voltage through those spikes and eliminates the cutout.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOS reporting wrong battery percentage after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Coolpad 8810's fuel gauge IC stores a discharge curve calibrated to the old cell. After you install a new cell, the IC compares real voltage to that old curve — the mismatch produces inaccurate percentage readings and erratic jumps. The fix is one full uninterrupted discharge down to automatic shutdown, followed by a full charge to 100% with fast charging off. After that cycle, the coulomb counter resets its reference points to the new cell and percentage readings stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404315721818,"sku":"BWCS-CPD810SL-1","price":28.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43404315754586,"sku":"BWCS-CPD810SL-2","price":32.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43404315787354,"sku":"BWCS-CPD810SL-3","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPD810SL-1.webp?v=1779369679","url":"https:\/\/batteryweb.com\/products\/coolpad-8810-replacement-battery-37v-1350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}