{"product_id":"audiovox-cdm-1400-replacement-battery-37v-600mah-li-ion","title":"AudioVox BTR1400 Replacement Battery 3.7V 600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAudioVox CDM-1400 \/ PCS-1400 Series — 3.7V Li-ion Replacement Battery (BTR1400)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 600mAh Li-ion replacement battery for the AudioVox CDM-1400, PCS-1400, PPC-1400, and PPC-1400 Slice. It slots into these early-2000s flip phones when the original cell has degraded past usable capacity. OEM part numbers BTR1400 and BTR-1400 both apply to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCDM-1400 and PCS-1400 platform fit:\u003c\/strong\u003e\n    These models share the same physical footprint, connector pin-out, and 3.7V single-cell voltage rail. One cell covers the entire group 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 the CDM-1400 charge circuit and confirmed the BMS accepts charge current normally, holds voltage at load, and trips protection at the correct low-voltage cutoff without false shutdowns.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to auto-shutoff before recharging. The CDM-1400 has no active coulomb counter — it reads voltage-curve estimates. One complete cycle anchors the gauge to the new cell's actual discharge curve so percentage readings stabilise.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–25% on the CDM-1400 after cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe CDM-1400's fuel gauge estimates remaining charge from a stored voltage-to-capacity curve calibrated to the original cell. A fresh Li-ion cell has a steeper voltage cliff below 3.6V than a worn one. When the phone's transmit circuit draws current during a call, voltage briefly sags below the BMS cutoff threshold even though the displayed percentage still reads 20–25%. The fix is one full discharge-charge cycle — after that, the gauge recalibrates and shutdowns at low percentage stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the battery has been sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 2–3% per month. A CDM-1400 battery stored for a year or more can drop below 2.5V per cell, which triggers BMS lockout — the protection circuit disconnects the cell entirely to prevent damage. The phone sees no voltage at the connector and won't respond to the power button. Connect the phone to a charger and leave it for 15–20 minutes before pressing power — most chargers trickle a recovery current that brings the cell above the 2.5V re-enable threshold before the BMS unlocks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405004963930,"sku":"BWCS-AU1400SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405004996698,"sku":"BWCS-AU1400SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405005029466,"sku":"BWCS-AU1400SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AU1400SL-1.webp?v=1779369805","url":"https:\/\/batteryweb.com\/products\/audiovox-cdm-1400-replacement-battery-37v-600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}