{"product_id":"fortuna-replacement-battery-37v-1000mah-li-ion","title":"Fortuna HXE-W01 GPS Navigator Compatible Battery 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFortuna HXE-W01 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion cell built to replace the original battery in Fortuna portable GPS navigators. It fits units using the HXE-W01 cell. Voltage and capacity match the original spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFortuna GPS navigator fit:\u003c\/strong\u003e\n    Fortuna handheld GPS units in this range share the HXE-W01 cell format — same connector, same voltage rail, same BMS communication. Swapping to this cell requires no modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on GPS-class hardware. The BMS held cutoff at the correct low-voltage threshold and accepted a full charge without thermal event or over-voltage fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start after power interruption:\u003c\/strong\u003e\n    After fitting this cell, power the GPS fully on outdoors before navigating. A full power removal forces a cold start — the receiver has lost its last known position and almanac cache, so first satellite acquisition takes longer than a normal warm start. Let the unit acquire a fix before you move off.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS battery draining faster on active navigation than standby\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eActive navigation runs the GPS receiver and display simultaneously, which draws significantly more current than standby. On a 1000mAh cell at 3.7V, that combined load is the primary drain factor. Screen brightness has a measurable effect — full brightness can double display current draw compared to mid-brightness. If drain seems excessive, check whether the backlight timeout is set or if the screen stays on continuously during navigation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS shutting off without warning before the battery indicator hits empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a full power removal and reinstall, the fuel gauge on the GPS unit loses its calibration reference. The device reads estimated charge from voltage curves, not a tracked capacity state. Under load, voltage sags earlier than the indicator predicts, so the low-battery threshold is hit before the visual warning has time to display. Run two full charge-to-cutoff cycles to let the unit recalibrate its voltage-to-charge mapping. After that, shutoff and warning should align.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377708826714,"sku":"BWCS-XEW01SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377708859482,"sku":"BWCS-XEW01SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377708892250,"sku":"BWCS-XEW01SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XEW01SL-1.webp?v=1778771896","url":"https:\/\/batteryweb.com\/products\/fortuna-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}