{"product_id":"gp-replacement-battery-12v-1200mah-ni-mh","title":"GP 14M Replacement Battery 1.2V 1200mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGP GP14M — 1.2V Ni-MH 1200mAh Replacement Battery (14M145)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 1.2V, 1200mAh Ni-MH replacement cell for portable media players that use the GP 14M battery format. It covers part numbers 14M, GP14M, 14M145, and HF18\/07\/68. When the original cell degrades and can no longer hold charge, this cell restores full operating voltage without replacing the entire device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGP 14M cell format:\u003c\/strong\u003e\n    Devices spec'd to this format share a common voltage rail at 1.2V nominal and a flat form factor — 66.78 x 16.70 x 5.96mm — that fits the battery bay without modification. The Ni-MH chemistry matches the charge curve the original charging circuit expects.\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 a controlled bench rig. The BMS handshake completed normally, charge acceptance was consistent across cycles, and cell temperature stayed within Ni-MH operating limits throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for media players:\u003c\/strong\u003e\n    If the player has been stored with a flat cell, connect it to the charger and leave it for 30 minutes before attempting to power on. Media players using this cell format often enter a deep discharge protection state that requires a slow trickle to pre-charge the cell before the device accepts normal 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  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells discharge along a relatively flat voltage curve, then drop sharply near end of charge. The audio amplifier inside most portable media players draws a small current surge when driving headphone output. At the tail end of discharge, that surge is enough to pull cell voltage below the device's cutoff threshold — even when the battery gauge still reads partial charge. This is a voltage sag issue, not a capacity issue. A fresh, fully charged cell eliminates the sag margin problem; charge to full and the symptom stops.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePortable media players track charge state by measuring cell voltage against stored thresholds calibrated to the original cell's discharge curve. A new Ni-MH cell, especially before its first full cycle, sits at a slightly different resting voltage than the old degraded cell. The indicator algorithm reads that as an inconsistency and recalibrates in steps, causing visible jumps. Run two full charge-to-discharge cycles and the gauge stabilises. After the second cycle, resting voltage should read between 1.20V and 1.25V at partial charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381334048858,"sku":"BWCS-VL700F6-1","price":20.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381334081626,"sku":"BWCS-VL700F6-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381334114394,"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\/gp-replacement-battery-12v-1200mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}