{"product_id":"sierra-wireless-aircard-762s-replacement-battery-37v-2000mah-li-ion","title":"Sierra Wireless AirCard 762s W-3 Replacement Battery 3.7V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSierra Wireless AirCard 762s — 3.7V Li-ion Replacement Battery (W-3)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2000mAh Li-ion battery replaces the original W-3 cell in the Sierra Wireless AirCard 762s and 760s mobile hotspots. It also fits the Wi-Fi 4G FC80 and AirCard 760. Swap it when the original cell can no longer hold enough charge to keep your hotspot running through a work session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAirCard 760s and 762s platform:\u003c\/strong\u003e\n    Both models share the same 3.7V nominal rail, W-3 connector footprint, and BMS handshake protocol. That means one cell works across the platform — no firmware difference between the two units changes how the battery communicates state-of-charge to the device.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell under combined modem and Wi-Fi load, cycling through charge and discharge. The BMS held the low-voltage cutoff correctly and passed state-of-charge data to the hotspot UI without error codes or false low-battery alerts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended sessions:\u003c\/strong\u003e\n    Keep the hotspot on a hard, flat surface when running it for several hours continuously. The cellular radio pushes to maximum transmit power whenever connected devices are at range limit — that sustained RF output generates heat that feeds back into the battery cavity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the AirCard 762s drops connections mid-session on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 762s runs two power-hungry subsystems simultaneously — the cellular modem and the Wi-Fi radio. When multiple devices connect and signal quality is marginal, both subsystems ramp to peak draw at the same time. This combined load can pull enough current to drag cell voltage below the BMS cutoff threshold momentarily, triggering a restart. It is not a faulty battery — it is a load spike the original aged cell also struggled with. Reduce connected device count or move closer to the cell tower to cut modem transmit power and stabilise voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHotspot shows solid power light but will not boot after sitting in a drawer\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 2–3% per month in storage. A hotspot left unused for several months can arrive at a cell voltage below 3.0V — below the minimum the BMS allows for a boot sequence. The device may show no display response or cycle on and off immediately. Connect the hotspot to a charger and leave it for 30–45 minutes before attempting to power it on. Once the cell climbs back above approximately 3.2V, the BMS re-enables discharge and the unit will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377844125786,"sku":"BWCS-SWA760RX-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377844158554,"sku":"BWCS-SWA760RX-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377844191322,"sku":"BWCS-SWA760RX-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWA760RX-1.webp?v=1778773895","url":"https:\/\/batteryweb.com\/products\/sierra-wireless-aircard-762s-replacement-battery-37v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}