{"product_id":"amazon-kindle-oasis-replacement-battery-37v-240mah-li-polymer","title":"Amazon Kindle Oasis 58-000117 Replacement Battery 3.7V 240mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Oasis — 3.7V Li-Polymer Replacement Battery (58-000117)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 240mAh Li-Polymer replacement battery for the Amazon Kindle Oasis e-reader (models KO1, 223337, SW56RW and related variants). It fits the original cell slot and connects to the same BMS interface as the factory unit. Part number 58-000117 confirms the correct cell for this specific Kindle generation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Oasis KO1 and 223337 compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V cell footprint, connector pinout, and BMS communication protocol — the firmware reads charge state and temperature data from the same register set across all listed variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the Kindle Oasis platform. The BMS accepted the cell without fault codes, and charge percentage reporting stabilised after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle for Kindle Oasis:\u003c\/strong\u003e\n    After installing, connect via the Kindle's USB cable and charge without interruption until the indicator confirms full charge. The Oasis firmware recalibrates its fuel gauge to the new cell during this first uninterrupted cycle — skipping it causes the percentage display to jump erratically.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle Oasis shows low battery immediately after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V or below — not at a full 4.2V charge. The Kindle Oasis firmware reads this low resting voltage and flags it as a depleted battery before you even power on. This is not a cell defect. Connect to USB power immediately after installation and allow a full uninterrupted charge cycle before drawing any conclusions about capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after the swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Oasis fuel gauge IC stores calibration data tied to the original cell's charge curve. When a new cell is installed, those stored values no longer match the actual charge state, so the displayed percentage reads inconsistently. The firmware recalibrates automatically, but only during a full charge-to-discharge cycle. Run one complete cycle — charge to 100%, use until the device prompts for charge — and the percentage display will stabilise at that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360245350490,"sku":"BWCS-ABW560SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360245383258,"sku":"BWCS-ABW560SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360245416026,"sku":"BWCS-ABW560SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABW560SL-1.webp?v=1778610980","url":"https:\/\/batteryweb.com\/products\/amazon-kindle-oasis-replacement-battery-37v-240mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}