{"product_id":"tecdesk-model-5-replacement-battery-37v-1200mah-li-ion","title":"Tecdesk Model 5 Compatible Battery 3.7V 1200mAh TD\/BAT1000","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTecdesk Model 5 — 3.7V Li-ion Replacement Battery (TD\/BAT1000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh (4.44Wh) Li-ion replacement battery for the Tecdesk Model 5 smartphone. It fits the original battery bay directly, using OEM part references TD\/BAT1000 and TD\/GEN1000. If your Model 5 no longer holds charge or shuts down unexpectedly, this cell restores full operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTecdesk Model 5 fitment:\u003c\/strong\u003e\n    The Model 5 uses a single-cell 3.7V nominal architecture with a fixed connector pinout. This replacement matches that voltage rail and connector layout, so the charge IC communicates with the cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Model 5 platform. The BMS accepted the cell without fault flags, and the charge IC completed a full constant-current\/constant-voltage cycle without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes load into an uncalibrated coulomb counter.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Model 5 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Model 5 uses a fuel gauge IC that builds a charge model against the original cell's impedance and discharge curve over hundreds of cycles. When a new cell goes in, that stored model no longer matches the physical chemistry it's measuring. The gauge reads state-of-charge against the wrong curve, so it can show 40% and drop to 0% with no warning, or sit at 100% long after the cell has peaked. One full slow-charge cycle — from under 10% to 100% without fast charge — forces the coulomb counter to reset and relearn against the new cell. After that cycle, percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under high-current load — modem transmit bursts, screen at full brightness, or GPS active simultaneously. A fresh cell with an uncalibrated fuel gauge has no accurate low-voltage floor mapped yet, so the device hits the hardware cutoff without the OS issuing a low-battery warning. The BMS trips to protect the cell once voltage sags below approximately 3.0V under load. Run the recalibration cycle first; if shutdowns continue after that, check the screen brightness and background sync settings to reduce simultaneous peak draw.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391811223642,"sku":"BWCS-PTU110SL-1","price":16.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391811256410,"sku":"BWCS-PTU110SL-2","price":17.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391811289178,"sku":"BWCS-PTU110SL-3","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTU110SL-1.webp?v=1779142239","url":"https:\/\/batteryweb.com\/products\/tecdesk-model-5-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}