{"product_id":"wiko-ozzy-replacement-battery-37v-1100mah-li-ion","title":"Wiko Ozzy 3.7V 1100mAh Replacement Battery 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 1100mAh Li-ion cell replaces the factory battery in the Wiko Ozzy and Ozzy Double Sim smartphones. It fits both single-SIM and dual-SIM variants of the Ozzy — same physical dimensions at 65.10 × 44.00 × 4.50mm and same voltage rail. Swap it when the original cell no longer holds charge through a normal day.\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 models share the same PCB voltage rail, connector pinout, and BMS handshake protocol. One cell fits either variant — no hardware differences affect the swap.\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 Ozzy platform. The BMS accepted the cell without fault codes, and the charge IC reached full-charge termination correctly on each cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    On first use, disable any fast-charge mode and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into 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\"\u003eWhy the Ozzy reports the wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Ozzy's fuel gauge IC builds its percentage model from the discharge curve of the original cell over many cycles. When you install a new cell, that stored curve no longer matches actual cell behaviour. The gauge reads voltage and converts it to a percentage using the old map — which is now wrong. One complete discharge from 100% down to auto-shutdown, followed by a full charge to 100%, forces the coulomb counter to recalibrate against the new cell and restore accurate readings.\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 — modem transmit bursts and screen brightness spikes draw enough current to pull the cell below the BMS cutoff threshold even while the gauge still reads 20–30%. It is a voltage-sag event, not a capacity fault. Let the phone power back on and check the resting voltage — if it climbs back above 3.5V within 30 seconds, the cell is fine and the fuel gauge simply needs a full recalibration cycle to account for the new cell's internal resistance profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404275875930,"sku":"BWCS-WKZ005SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404275908698,"sku":"BWCS-WKZ005SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404275941466,"sku":"BWCS-WKZ005SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WKZ005SL-1.webp?v=1779369616","url":"https:\/\/batteryweb.com\/products\/wiko-ozzy-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}