{"product_id":"apple-ipod-4th-generatio-replacement-battery-37v-1200mah-li-ion","title":"Apple iPOD 4th Gen Replacement Battery 3.7V 1200mAh 616-0183","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPod 4th Generation \/ iPod Photo — 3.7V Li-ion Replacement Battery (616-0183)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1200mAh Li-ion battery replaces the original cell in the Apple iPod 4th Generation and iPod Photo, including the 40GB M9585LL\/A and M9585ZR\/A models. It cross-references OEM part numbers 616-0183, 616-0206, 616-0215, AW4701218074, and ICP0534500. Install it when the original cell no longer holds enough charge to run playback.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eiPod 4th Gen and Photo compatibility:\u003c\/strong\u003e\n    Both the standard 4th Generation and the Photo variants share the same 3.7V single-cell architecture, connector pinout, and BMS voltage thresholds — which is why one cell covers the entire range. The 51 × 36 × 7mm footprint sits flush in the bay without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge runs on a 4th Gen unit. The BMS accepted the new cell without error, held the charge curve through a complete discharge, and did not trigger low-voltage cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    After fitting this battery, connect the iPod to a charger before powering it on. Media players frequently enter deep-discharge protection after a cell swap, and skipping the initial charge can lock the device in a state where it won't respond to the hold switch or center button.\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 erratically after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe iPod's fuel gauge is calibrated against the charge curve of the original cell. A new cell has a slightly different internal resistance profile, so the voltage-threshold indicator takes several full cycles to recalibrate. You'll see the percentage jump — sometimes dropping 20% in seconds — during the first two or three charge cycles. Run two full charge-to-depletion cycles and the readout stabilises. If it still jumps after three cycles, check that the battery connector is fully seated.\u003c\/p\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\"\u003eThe iPod's audio amplifier draws a short current spike when the cell voltage drops toward the lower end of its discharge curve. If the cell is aged or the connector has resistance from corrosion, that spike causes the voltage to sag below the BMS cutoff threshold — killing playback even though the indicator still shows remaining charge. Clean the battery connector pads with isopropyl alcohol, reseat the connector, and check the cell voltage with a meter. A resting voltage below 3.5V means the cell needs replacing; 3.7V at rest is the target after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381352890458,"sku":"BWCS-IPOD4HL-1","price":13.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381352923226,"sku":"BWCS-IPOD4HL-2","price":15.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381352955994,"sku":"BWCS-IPOD4HL-3","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPOD4HL-1.webp?v=1778900214","url":"https:\/\/batteryweb.com\/products\/apple-ipod-4th-generatio-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}