{"product_id":"telstra-mr2100-replacement-battery-37v-5040mah-li-polymer","title":"Telstra MR2100 W-10a Replacement Battery 3.7V 5040mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTelstra MR2100 \/ Netgear Nighthawk M2 — 3.7V Li-Polymer Replacement Battery (W-10a)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the W-10a 3.7V, 5040mAh lithium-polymer battery for the Telstra MR2100 and Netgear Nighthawk M2 mobile hotspot. It slots directly into the battery bay and restores the device's ability to run the combined cellular modem and Wi-Fi radio on a full charge cycle. Capacity is rated at 18.65Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMR2100 and Nighthawk M2 compatibility:\u003c\/strong\u003e\n    Both models use the same battery bay dimensions, W-10a part number, and 3.7V power rail. The BMS handshake is identical across both, so one cell covers either unit without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell under simultaneous cellular and Wi-Fi load at maximum connected devices. The BMS held voltage across the full discharge curve with no thermal cutoff events and no unexpected shutdown at low state-of-charge.\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 — not a bag pocket or enclosed space — when running for long periods. The cellular radio pushes to maximum output power in low-signal areas, and heat builds quickly inside a confined space, accelerating 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 MR2100 drops connections mid-session under high device load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen multiple devices are connected and the hotspot is holding a busy cellular session, current draw from the combined modem and Wi-Fi radio spikes sharply. An aged or degraded cell can't sustain that draw without voltage sagging below the BMS cutoff threshold. The unit resets to protect the cell, and all connected devices lose their session. A new cell with full capacity holds the voltage rail steady through those load spikes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMR2100 won't power on after sitting unused for several weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge during storage, and the MR2100's standby draw accelerates this further. If the cell drops below roughly 3.0V, the BMS blocks startup to prevent damage. Plug into the supplied charger and leave it for 20–30 minutes before attempting to power on — most BMS circuits will begin a recovery charge cycle at that point and restore boot voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377828429914,"sku":"BWCS-TRA110SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377828462682,"sku":"BWCS-TRA110SL-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377828495450,"sku":"BWCS-TRA110SL-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRA110SL-1.webp?v=1778773895","url":"https:\/\/batteryweb.com\/products\/telstra-mr2100-replacement-battery-37v-5040mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}