{"product_id":"wiko-ozzy-replacement-battery-37v-1400mah-li-ion","title":"Wiko Ozzy Replacement Battery 3.7V 1400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWiko Ozzy \/ Ozzy Double Sim — 3.7V Li-ion Replacement Battery (OZZY)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1400mAh Li-ion cell replaces the original battery in the Wiko Ozzy and Ozzy Double Sim smartphones. It fits both single and dual-SIM variants, which share the same battery bay dimensions and connector. Capacity is rated at 5.18Wh, matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOzzy and Ozzy Double Sim compatibility:\u003c\/strong\u003e\n    Both variants use an identical 65.10 × 44.00 × 4.50mm cell with the same three-contact connector and BMS handshake protocol. The dual-SIM model draws slightly higher idle current from the second radio, but both operate within the same voltage rail and charge termination threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge-discharge cycles on the Ozzy platform. The BMS correctly reported cell state to the phone's charge IC, and termination voltage held steady at 4.2V with no false cutoff events observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable fast charging if available and run one full discharge-charge cycle before normal use. This allows the fuel gauge IC to map the new cell's discharge curve before it begins tracking state-of-charge against an uncalibrated baseline.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Ozzy reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Ozzy's fuel gauge IC stores a learned discharge curve from the original cell. After installing a new cell, the IC has no reference data, so percentage readings can be inaccurate — sometimes showing 100% while the phone is nearly flat, or dropping suddenly. One full discharge to automatic shutdown followed by an uninterrupted charge to 100% forces the coulomb counter to relearn the new cell's actual capacity curve. After that single cycle, percentage readings stabilise. Do not interrupt the first charge cycle early.\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 modem or display triggers a current spike the cell cannot sustain while maintaining voltage above the BMS cutoff threshold. The BMS reads the voltage dip as a critically low cell and disconnects before the displayed percentage reaches zero. It is not a faulty battery — it is an uncalibrated fuel gauge misreading remaining capacity. Run two full discharge-charge cycles and the cutoff point will shift back toward the correct low-voltage threshold, typically around 3.4V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404230262874,"sku":"BWCS-WKZ005XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404230295642,"sku":"BWCS-WKZ005XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404230328410,"sku":"BWCS-WKZ005XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WKZ005XL-1.webp?v=1779369465","url":"https:\/\/batteryweb.com\/products\/wiko-ozzy-replacement-battery-37v-1400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}