{"product_id":"sony-d-ej01-replacement-battery-12v-1200mah-ni-mh","title":"NC-5WM Compatible Battery Sony D-EJ01 Walkman 1.2V 1200mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony D-EJ01 \/ D-EJ915 \/ D-EJ925 Series — 1.2V Ni-MH Replacement Battery (NC-5WM)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 1.2V, 1200mAh Ni-MH replacement battery for Sony portable CD Walkman players. It fits the D-EJ01, D-EJ915, D-EJ925, D-EJ955, and over 87 additional D-series models that share the NC-5WM form factor. If your unit no longer powers on or drops out mid-track, this cell is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD-EJ01 \/ D-EJ9xx series fit:\u003c\/strong\u003e\n    These models share the same single-cell Ni-MH housing, connector position, and charge management circuit. The BMS on each unit expects a 1.2V nominal cell — swapping a different voltage or chemistry triggers charge fault behaviour.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the D-EJ01 charge circuit and confirmed the BMS accepted full charge without fault. Discharge curve stayed flat through mid-cycle and dropped cleanly at the low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after extended storage:\u003c\/strong\u003e\n    These players enter deep-discharge protection if the battery has sat dead for months. Connect the charger and leave it for at least 30 minutes before attempting to power on — the circuit needs a slow trickle before it will accept normal charge current.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator shows empty\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe D-EJ series audio amplifier draws a short current spike each time the laser seeks a new track. Near the end of a Ni-MH discharge curve, cell voltage sags under that spike even though the indicator still shows charge remaining. The player reads this as a fault and cuts audio rather than risk a hard shutdown. This is normal Ni-MH behaviour at end-of-discharge, not a defective cell — a fresh 1200mAh cell will push the cutoff point much further into the cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after swapping the cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe D-EJ's fuel gauge uses voltage thresholds calibrated to an aged cell's discharge curve. A new 1200mAh Ni-MH cell holds voltage flatter for longer, so the indicator reads \"full\" then drops suddenly near the end. This is a gauge recalibration issue, not a fault with the replacement cell. Run two or three full charge-to-cutoff cycles and the indicator will stabilise against the new cell's actual voltage curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381334179930,"sku":"BWCS-VL700F6-1","price":20.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381334212698,"sku":"BWCS-VL700F6-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381334245466,"sku":"BWCS-VL700F6-3","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VL700F6-1.webp?v=1778900030","url":"https:\/\/batteryweb.com\/products\/sony-d-ej01-replacement-battery-12v-1200mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}