{"product_id":"sony-portable-reader-prs-900-replacement-battery-37v-1400mah-li-ion","title":"Sony PRS-900 Portable Reader Compatible Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony Portable Reader PRS-900 — 3.7V Li-ion Replacement Battery (1-756-915-11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1400mAh Li-ion cell replaces the original battery in the Sony Portable Reader PRS-900 and PRS-900BC, also sold as the Sony Reader Daily Edition. It fits models using OEM part numbers 1-756-915-11, PRSA-BP9, and PRSA-BP9\/\/C(U3). Swap it in when the original cell no longer holds enough charge to get through a reading session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-900 and PRS-900BC compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. A single cell covers both units — no hardware differences affect fitment.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on PRS-900 hardware. The BMS accepted the new cell without fault codes, and the firmware recognised the pack without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eWi-Fi sync and charge management:\u003c\/strong\u003e\n    The PRS-900 draws significantly more current during Wi-Fi sync than during page turns. After installing this cell, complete a full USB charge cycle before enabling wireless sync — the firmware needs a full charge reference point to report battery percentage accurately after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-900 shows a low battery warning immediately after a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically between 3.6V and 3.7V — which sits just above the device's low-battery threshold. The PRS-900 firmware reads this as a near-depleted pack before any calibration has occurred. This is not a faulty cell. Connect the device to a USB charger and allow it to reach a full charge before first use. Once the firmware completes one full charge cycle, the battery percentage indicator will report correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-900 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the device shows no response after swapping the cell, the new battery's resting voltage may have dropped below the PRS-900's minimum boot voltage during storage. The device will not attempt to power on below approximately 3.4V. Connect the reader to a USB charger and leave it for at least 10 minutes without pressing the power button — the charging circuit will pre-charge the cell to a level where the boot sequence can start. After 10 minutes, press and hold the power button for five seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360268484698,"sku":"BWCS-PRD900SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360268517466,"sku":"BWCS-PRD900SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360268550234,"sku":"BWCS-PRD900SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD900SL_1.webp?v=1778611066","url":"https:\/\/batteryweb.com\/products\/sony-portable-reader-prs-900-replacement-battery-37v-1400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}