{"product_id":"audiovox-cdm-8200-replacement-battery-37v-1000mah-li-ion","title":"AudioVox BTR-8200 CDM-8200 Replacement Battery 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAudioVox CDM-8200 — 3.7V Li-ion Replacement Battery (BTR-8200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion replacement battery for the AudioVox CDM-8200 mobile phone. It replaces OEM part number BTR-8200 directly. If the original cell no longer holds charge or the phone shuts down unexpectedly, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCDM-8200 cell fitment:\u003c\/strong\u003e\n    The CDM-8200 uses a single-cell 3.7V nominal Li-ion pack with a hard-shell housing and a three-contact connector. The BMS handshake on this platform is minimal — voltage and thermistor pin only — so cell compatibility comes down to matching voltage rails and connector pinout, both of which this battery matches.\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 CDM-8200 platform. The BMS accepted the cell without fault flags, the thermistor pin read correctly, and charge termination triggered at the expected 4.2V cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, run one full discharge down to auto-shutoff, then charge uninterrupted to 100%. The CDM-8200's fuel gauge IC is calibrated to the original cell's discharge curve — skipping this step causes the percentage meter to track the old curve and report incorrect readings against the new cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CDM-8200 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe CDM-8200 uses a fuel gauge IC that tracks capacity against a stored discharge curve from the original cell. When a new cell goes in, that curve no longer matches the actual voltage-to-capacity relationship of the replacement. The gauge reads voltage and maps it against outdated reference data, so 60% displayed may actually be 40% remaining. One full discharge-to-shutoff followed by an uninterrupted charge resets the coulomb counter and lets the IC build a new reference curve against the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the CDM-8200\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff issue, not a capacity defect. When the CDM-8200 fires the modem for a call or peaks the backlight, current draw spikes sharply. If the cell voltage sags below the BMS low-voltage cutoff under that load — even briefly — the protection circuit trips and the phone shuts off, even though the gauge still shows charge remaining. On a new cell this usually means the fuel gauge hasn't recalibrated yet. Run one full cycle first. If shutdowns continue after calibration, check that the battery connector contacts are fully seated — a high-resistance connection amplifies voltage sag under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405153960026,"sku":"BWCS-AU8200SL-1","price":23.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405153992794,"sku":"BWCS-AU8200SL-2","price":26.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405154025562,"sku":"BWCS-AU8200SL-3","price":28.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AU8200SL-big.webp?v=1779370297","url":"https:\/\/batteryweb.com\/products\/audiovox-cdm-8200-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}