{"product_id":"t-mobile-icq037na-replacement-battery-38v-4850mah-li-polymer","title":"T-Mobile ICQ037NA Replacement Battery 3.8V 4850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile JEXtream RG2100 — 3.8V Li-Polymer Replacement Battery (ICQ037NA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 4850mAh Li-Polymer battery replaces the internal pack in the T-Mobile JEXtream RG2100 mobile hotspot (model ICQ037NA). It restores power to the device when the original battery no longer holds a charge or fails to reach boot voltage. Capacity is 18.43Wh — matching OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJEXtream RG2100 fit:\u003c\/strong\u003e\n    The RG2100 runs a single-cell Li-Polymer architecture at 3.8V nominal. This replacement matches the OEM connector pinout and BMS communication protocol so the hotspot firmware reads charge state correctly without throwing a battery error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined modem and Wi-Fi load — simultaneous cellular data and multi-device Wi-Fi. The BMS held stable voltage delivery and did not trip the low-voltage cutoff under peak draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended sessions:\u003c\/strong\u003e\n    Keep the RG2100 flat on a hard surface with airflow around it during long sessions. When connected devices are far from the hotspot, the cellular radio runs at maximum output power — the resulting heat accumulates in the battery cavity and accelerates cell stress.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the RG2100 drops Wi-Fi clients mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new battery can still cause mid-session disconnects if the combined load of the cellular modem and Wi-Fi radio briefly exceeds what the BMS allows at that charge level. The RG2100 draws simultaneous current from two radio subsystems — at maximum connected devices, peak draw spikes sharply. If the BMS sees a voltage dip below its cutoff threshold, it interrupts power to protect the cell. Running fewer simultaneous connected devices reduces peak draw and keeps the voltage rail stable.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRG2100 shows full charge but won't power on after sitting unused\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage. If the RG2100 sat unused for several weeks or months, the battery may have dropped below the minimum boot voltage — typically around 3.0V — even if the indicator LED suggested otherwise before shutdown. The device firmware requires a minimum voltage to initialise the modem before it will power on. Connect the unit to a charger for at least 30 minutes before attempting to power on, allowing the cell to recover above 3.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377794547802,"sku":"BWCS-FWG210SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377794580570,"sku":"BWCS-FWG210SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377794613338,"sku":"BWCS-FWG210SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FWG210SL-1.webp?v=1778772243","url":"https:\/\/batteryweb.com\/products\/t-mobile-icq037na-replacement-battery-38v-4850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}