{"product_id":"audioline-mt1000-replacement-battery-37v-1200mah-li-ion","title":"Audioline MT1000 Compatible Battery 3.7V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAudioline MT1000 — 3.7V Li-ion Replacement Battery (MT1000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion cell delivers 1200mAh (4.44Wh) to the Audioline MT1000 smartphone. It replaces the original battery when capacity has dropped or the cell no longer holds a charge. Dimensions are 53.20 × 34.00 × 5.70mm — verify against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMT1000 platform fit:\u003c\/strong\u003e\n    The MT1000 runs a fixed 3.7V nominal rail with a standard Li-ion BMS handshake. This cell matches that voltage and connector, so the charge IC recognises it without a firmware workaround.\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 test rig, confirming the BMS communicates correctly with the charge IC and that protection cutoffs trigger at the expected thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter to the new cell's actual discharge curve before any high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MT1000 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MT1000 uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the physical cell chemistry. The gauge reports percentages based on old data until it recalibrates. One complete discharge to auto-shutoff followed by a full charge at standard current rewrites the reference curve and restores accurate readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the MT1000 after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under peak load — typically the modem transmitting or the screen at full brightness — faster than the fuel gauge predicts. The phone shuts down because cell voltage hits the BMS low-voltage cutoff while the gauge still shows remaining capacity. It is a calibration gap, not a faulty cell. Run two full discharge-charge cycles and the gauge will align its low-voltage threshold correctly, typically around 3.0–3.2V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404294357082,"sku":"BWCS-AY4020CL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404294389850,"sku":"BWCS-AY4020CL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404294422618,"sku":"BWCS-AY4020CL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AY4020CL_1.webp?v=1778366906","url":"https:\/\/batteryweb.com\/products\/audioline-mt1000-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}