{"product_id":"att-unite-pro-replacement-battery-37v-2200mah-li-ion","title":"AT\u0026T Unite Pro 4G Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T Unite Pro \/ Aircard 781S — 3.7V Li-ion Replacement Battery (W-6, 5200080)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2200mAh Li-ion battery fits the AT\u0026amp;T Unite Pro, Unite Pro 4G, Unite Pro 4G LTE, and Aircard 781S mobile hotspots. It replaces the original cell when capacity has dropped and the device can no longer hold a charge through a full session. Voltage and connector match the OEM spec — no modifications needed to fit the battery compartment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUnite Pro and Aircard 781S compatibility:\u003c\/strong\u003e\n    All four model variants in this line share the same 3.7V single-cell architecture, battery footprint, and connector pin-out. The BMS handshake is identical across the Unite Pro 4G and 4G LTE variants, so one replacement cell covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the Aircard 781S under a simulated multi-device Wi-Fi load alongside active cellular data. The BMS held a stable discharge curve with no false low-voltage cutoffs at the modem draw peaks.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended hotspot sessions:\u003c\/strong\u003e\n    Keep the Unite Pro on a hard, open surface when running extended sessions. When connected devices are far from the hotspot, the cellular radio pushes to maximum output power — that heat accumulates directly against the battery and accelerates cell degradation over time.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHotspot disconnecting users mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Unite Pro runs two power-hungry subsystems simultaneously — the cellular modem and the Wi-Fi radio. At maximum connections, the combined current draw creates brief voltage sag events. If the replacement cell has marginal internal resistance, the BMS interprets the sag as a low-voltage fault and cuts power to the modem, dropping all connected sessions. A cell meeting the original 2200mAh spec at proper internal resistance handles those peaks without triggering the cutoff. If disconnections persist, check that the battery contacts are clean and fully seated — a partial connection increases effective resistance at the terminal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUnite Pro not powering on after sitting unused for several weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and the Unite Pro draws a small standby current even when powered off. Left long enough, the battery drops below the minimum boot voltage — typically around 3.0V for this cell — and the device will not respond to the power button. Connect the hotspot to a wall charger and leave it for at least 20 to 30 minutes before attempting to power on; most chargers will not output a fast-charge current until the cell recovers above 3.0V. If the indicator light never appears after 45 minutes on charge, the cell may have dropped below recoverable depth and requires replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377858871386,"sku":"BWCS-ATP781RC-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377858904154,"sku":"BWCS-ATP781RC-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377858936922,"sku":"BWCS-ATP781RC-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ATP781RC-1.webp?v=1778773918","url":"https:\/\/batteryweb.com\/products\/att-unite-pro-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}