{"product_id":"globalstar-bt-338-replacement-battery-37v-1800mah-li-ion","title":"Globalstar BT-338 Replacement Battery 3.7V 1800mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGlobalstar BT-338 Series — 3.7V Li-ion Replacement Battery (NTA2236)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1800mAh Li-ion cell replaces the original NTA2236 battery in the Globalstar BT-338, BT-318, BT-318X, and BT-335 satellite communicators. These devices provide two-way messaging and emergency SOS via satellite in areas with no cellular coverage. Fit this cell when your unit no longer holds a charge through a full day of off-grid use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBT-338 \/ BT-318 \/ BT-318X \/ BT-335 compatibility:\u003c\/strong\u003e\n    All four models run the same 3.7V power rail and use the same NTA2236 cell format with a matching connector and BMS handshake, so one cell covers the full 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 a BT-338 unit. The BMS accepted the cell without fault flags, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start satellite acquisition after swap:\u003c\/strong\u003e\n    After fitting this cell, power the unit on outdoors before your trip and let it acquire a full satellite fix. A cold start after complete power removal takes 5–10 minutes for first lock — far longer than the under-one-minute warm starts the device normally performs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage-threshold indicator drift on the BT-338 after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BT-338 calibrates its fuel gauge against the original cell's discharge curve. A new cell can cause the indicator to read differently until the unit completes one or two full charge-discharge cycles. During this period the battery percentage shown on screen may not match actual remaining capacity. Run the unit down to auto-shutoff and then charge it fully twice to let the gauge recalibrate against the new cell's curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBT-338 shuts off without a low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge threshold is uncalibrated and the cell voltage drops to the BMS cutoff — around 3.0V — before the device registers a low-battery alert. The unit sees enough voltage to run, then hits cutoff abruptly. It is not a fault with the cell itself. Complete two full charge-discharge cycles so the device can re-anchor its shutoff warning to the correct voltage point on the new cell's discharge curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377723605082,"sku":"BWCS-BT388SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377723637850,"sku":"BWCS-BT388SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377723670618,"sku":"BWCS-BT388SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BT388SL-1.webp?v=1778771839","url":"https:\/\/batteryweb.com\/products\/globalstar-bt-338-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}