{"product_id":"sirius-gex-xmp3-replacement-battery-37v-800mah-li-ion","title":"Sirius GEX-XMP3 Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSirius GEX-XMP3 \/ XMP3i — 3.7V Li-ion Replacement Battery (XM-6900-0004-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 800mAh Li-ion cell replaces the original battery in the Sirius GEX-XMP3, XMP3i, and XMP3H1 portable satellite radio receivers. It matches the OEM dimensions at 55.46 × 35.66 × 4.88mm and uses the same connector and BMS handshake as the factory unit. Capacity is rated at 2.96Wh — identical to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGEX-XMP3 \/ XMP3i \/ XMP3H1 fit:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions, connector pinout, and voltage rail. The BMS on each unit expects the same 3.7V nominal cell — no firmware or hardware differences affect battery compatibility across this group.\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 the GEX-XMP3 platform and confirmed the BMS accepts the cell without fault codes. The protection circuit tripped correctly at the low-voltage cutoff, and charge acceptance was normal from a cold start.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install charge requirement:\u003c\/strong\u003e\n    After fitting this battery, connect the device to its charger before powering on. Cells shipped in storage-safe partial charge may sit below the GEX-XMP3's wake threshold — the unit will appear dead until the charger delivers enough trickle current to bring the cell above the BMS enable voltage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after cell swap on the GEX-XMP3\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GEX-XMP3 uses a voltage-threshold fuel gauge rather than a coulomb counter. After a cell swap, the device has no learned discharge curve for the new cell, so the percentage display recalibrates in steps rather than smoothly. This is normal behaviour and not a fault with the replacement cell. Run two or three full charge-to-cutoff cycles and the displayed percentage will track more accurately against actual remaining capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePlayback cutting out before the battery indicator shows empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe audio amplifier in the GEX-XMP3 draws a higher instantaneous current than the display or tuner circuits. As the cell discharges toward its lower voltage limit, internal resistance rises and the amplifier can no longer pull sufficient current — the device cuts audio or shuts off even though the fuel gauge still shows a charge remaining. This is a voltage-sag effect at end-of-discharge, not a capacity fault. If this happens, connect the charger immediately; a short charge session will recover enough cell voltage to resume playback.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381338996826,"sku":"BWCS-PXM3SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381339029594,"sku":"BWCS-PXM3SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381339062362,"sku":"BWCS-PXM3SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PXM3SL-1.webp?v=1778900029","url":"https:\/\/batteryweb.com\/products\/sirius-gex-xmp3-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}