{"product_id":"e-mobile-d25hw-replacement-battery-37v-1500mah-li-ion","title":"E-Mobile D25HW Replacement Battery 3.7V 1500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eE-Mobile D25HW Pocket WiFi — 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 E-Mobile D25HW and Pocket WiFi mobile hotspot. It restores power to the hotspot unit when the original cell has degraded or failed completely. Capacity is 1500mAh (5.55Wh) — taken from the product specification, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD25HW and Pocket WiFi fit:\u003c\/strong\u003e\n    Both devices share the same physical cell format, voltage rail, and connector pinout. The BMS handshake requirements match — no adapter or modification needed to seat and charge this cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through full charge and discharge on the D25HW platform. The BMS communicated charge state correctly and cut off at the expected low-voltage threshold without triggering a false shutdown during active data sessions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended hotspot sessions:\u003c\/strong\u003e\n    Keep the D25HW in an open, ventilated spot — not a pocket or bag — during long sessions. When connected devices are far from the hotspot, the cellular radio runs at maximum output power. That sustained heat load sits directly against the battery cell 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\"\u003eWhy the D25HW disconnects connected devices mid-session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe D25HW runs two radios simultaneously — a cellular modem and a WiFi access point. At maximum client connections, combined current draw spikes sharply. If the battery cell has aged or is a low-capacity replacement, voltage sags below the BMS protection threshold during these peaks. The BMS interprets this sag as a fault and briefly cuts power to the modem, dropping all connected sessions. A fresh, full-capacity cell at 3.7V nominal holds voltage stable through these draw spikes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHotspot not powering on after sitting unused for weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage — the D25HW draws a small standby current even when switched off, accelerating this drain. If the cell drops below approximately 2.5V, the BMS locks out normal boot to protect the cell from further damage. Plug the hotspot into a charger and leave it for 20–30 minutes before attempting to power on. If the charge indicator doesn't respond at all, the cell has likely dropped below the BMS recovery threshold and needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377850056794,"sku":"BWCS-SBX150RX-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377850089562,"sku":"BWCS-SBX150RX-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377850122330,"sku":"BWCS-SBX150RX-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBX150RX-1.webp?v=1778773940","url":"https:\/\/batteryweb.com\/products\/e-mobile-d25hw-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}