{"product_id":"netgear-mingle-3g-replacement-battery-37v-1500mah-li-ion","title":"Netgear Mingle 3G Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNetgear Mingle 3G \/ AirCard 778S — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-ion battery fits the Netgear Mingle 3G, Mingle 4G, NTGR778AVB, and AirCard 778S mobile hotspot devices. It replaces the original cell when capacity has dropped and the hotspot can no longer hold a charge through a typical session. Dimensions are 61.30 × 41.30 × 6.60mm — verify against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMingle 3G \/ 4G and AirCard 778S platform fit:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector pinout, and BMS communication protocol. One cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery under combined modem and Wi-Fi load — simulating four connected clients — and confirmed the BMS held voltage above the cutoff threshold without tripping a false low-battery shutdown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended sessions:\u003c\/strong\u003e\n    Keep the hotspot on a hard, open surface when running extended sessions. The cellular radio pushes to maximum output power when connected devices are far away, and trapped heat accelerates cell degradation faster than charge cycling alone.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMobile hotspot disconnecting users mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen all four client slots are active and the cellular signal is marginal, the modem and Wi-Fi radios draw simultaneously at peak output. This combined load creates a brief voltage sag that the BMS can read as an undervoltage event, triggering a protective cutoff even with a new cell. The fix is to move the hotspot closer to a window or external wall to reduce radio output demand. Reducing active client connections to two or three also flattens the draw curve and stops the sag from hitting the BMS threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHotspot shows full bars but won't power on after sitting unused\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 1–2% per month. If the hotspot sat unused for several months, the cell may have dropped below the minimum boot voltage — typically around 3.0V — and the BMS locks out the device entirely. Connect the hotspot to a charger and leave it for at least 30 minutes before attempting to power on; most chargers apply a low-current trickle below 3.0V to bring the cell back into the normal charge window. If the LED shows no activity after 30 minutes, the original cell is fully depleted and the replacement cell is the correct next step.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377887772762,"sku":"BWCS-SWA883RC-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377887805530,"sku":"BWCS-SWA883RC-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377887838298,"sku":"BWCS-SWA883RC-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWA883RC-1.webp?v=1778773940","url":"https:\/\/batteryweb.com\/products\/netgear-mingle-3g-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}