{"product_id":"globalsat-bt-359-replacement-battery-37v-1100mah-li-ion","title":"Globalsat BT-359 GPS Replacement Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGlobalsat BT-359 \/ TR-101 Series — 3.7V Li-ion Replacement Battery (LIN-331)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1100mAh Li-ion cell replaces the original battery in the Globalsat BT-359, BT-359W, TR-101, and TR-102 portable GPS receivers. It matches the OEM voltage rail and physical footprint at 52.90 × 38.12 × 8.02mm. Capacity is 4.07Wh, identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBT-359 and TR-101\/102 platform compatibility:\u003c\/strong\u003e\n    These four models share the same battery bay dimensions, 3.7V single-cell architecture, and connector orientation — one cell covers all four without 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 hardware and confirmed the BMS holds the 4.2V charge ceiling and cuts off cleanly at the low-voltage threshold without triggering a hard fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start behaviour after fitting:\u003c\/strong\u003e\n    After fitting this cell, power the unit on outdoors with a clear sky view. The GPS performs a full cold start after any complete power removal — first satellite acquisition takes 5–10 minutes. Subsequent warm starts drop to under a minute once ephemeris data is cached.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reducing at low battery on the BT-359\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen battery voltage drops below roughly 3.5V, some GPS receivers throttle receiver sensitivity to reduce current draw and extend operating time. On the BT-359, this shows up as position drift or wider accuracy circles on the display. The fix is straightforward — the effect reverses once the unit is running on a freshly charged cell. If accuracy problems appear mid-session, check the battery indicator and recharge before your next use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice shuts off without warning before the low-battery indicator appears\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge or voltage threshold indicator is uncalibrated against the new cell. The BMS protection circuit cuts power at its hard floor — typically 3.0V — before the device's own software indicator has had a chance to display a warning. Run two full charge-to-cutoff cycles to let the device recalibrate its voltage curve. After those cycles, low-battery warnings should appear at the correct point before shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377717608538,"sku":"BWCS-BT359SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377717641306,"sku":"BWCS-BT359SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377717674074,"sku":"BWCS-BT359SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BT359SL-1.webp?v=1778771839","url":"https:\/\/batteryweb.com\/products\/globalsat-bt-359-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}