{"product_id":"sony-nw-a2000-replacement-battery-37v-750mah-li-polymer","title":"Sony NW-A2000 Walkman Replacement Battery 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony NW-A2000 \/ NW-HD3 — 3.7V Li-Polymer Replacement Battery (LIS1317HNP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 750mAh Li-Polymer replacement battery for the Sony NW-A2000 and NW-HD3 Walkman digital audio players. It matches the OEM part number LIS1317HNP and fits the slim profile of both players. Capacity is drawn directly from the product spec — 750mAh \/ 2.78Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNW-A2000 and NW-HD3 compatibility:\u003c\/strong\u003e\n    Both players share the same battery bay dimensions, voltage rail, and connector pinout. The BMS handshake is identical across both units, so one cell covers either model without modification.\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 both the NW-A2000 and NW-HD3. The BMS accepted the cell cleanly, voltage held steady across the discharge curve, and the protection circuit tripped correctly at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol after cell swap:\u003c\/strong\u003e\n    These players frequently enter deep discharge protection after a dead-cell swap. Connect the USB charger immediately after installing the new cell and leave it for at least 30 minutes before attempting to power on — the device needs a trickle charge phase before it will draw normal current.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after cell swap on NW-A2000\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe NW-A2000 uses a voltage-threshold method to estimate charge level. After a new cell is installed, the player's internal reference points no longer match the actual discharge curve of the fresh battery. This causes the indicator to jump — sometimes from 80% to 20% in a single track. Run two or three full charge-to-discharge cycles and the indicator recalibrates against the new cell's actual voltage behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cuts out before the battery indicator shows empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt the tail end of a Li-Polymer discharge curve, cell voltage drops quickly below 3.5V. The audio amplifier stage in the NW-A2000 draws enough current at this point to cause a voltage sag that triggers the BMS protection cutoff — even though the indicator still shows a small charge remaining. This is not a faulty cell. Recharge the player when you notice the first volume instability rather than waiting for the indicator to reach zero.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381351776346,"sku":"BWCS-SA2000SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381351809114,"sku":"BWCS-SA2000SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381351841882,"sku":"BWCS-SA2000SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SA2000SL-1.webp?v=1778900214","url":"https:\/\/batteryweb.com\/products\/sony-nw-a2000-replacement-battery-37v-750mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}