{"product_id":"audiovox-shuttle-replacement-battery-37v-650mah-li-ion","title":"AudioVox Shuttle BTR7B Compatible Battery 3.7V 650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAudioVox Shuttle \/ CDM-8964 — 3.7V Li-ion Replacement Battery (BTR7B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 650mAh lithium-ion cell replacing part number BTR7B in the AudioVox Shuttle and CDM-8964 mobile phones. It slots into the original battery bay and connects via the factory contact plate. Voltage and physical dimensions match the OEM spec exactly — 53.50 × 53.00 × 4.00mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShuttle and CDM-8964 compatibility:\u003c\/strong\u003e\n    Both models use the same BTR7B footprint, contact layout, and 3.7V nominal rail. The BMS handshake is identical across this pair, so one cell works in either device 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 charge and discharge on the CDM-8964 platform. The onboard charge IC accepted the cell without fault flags, and the BMS held the low-voltage cutoff at the expected threshold without tripping prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installing this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% without interrupting the cycle. This gives the fuel gauge IC a complete reference curve for the new cell before daily use 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 Shuttle reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Shuttle's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The IC reads the new cell's voltage against old reference points and reports a percentage that can be several points off — often too high early in discharge and too low near the end. One full uninterrupted discharge-charge cycle rewrites the reference and corrects the readout.\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 modem or display draws a short burst of current and the cell voltage drops below the BMS low-voltage cutoff faster than the fuel gauge tracks it. The OS never registers zero percent — it simply cuts off. On a new cell this usually means the fuel gauge IC has not yet completed a calibration cycle and is misreporting usable capacity. Run one full discharge-charge cycle, then confirm the shutdown threshold moves closer to 5–10%. If the phone still cuts out above 20% after two full cycles, check that the contact pins on the battery bay are seating cleanly against the cell terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405072433242,"sku":"BWCS-PBR520SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405072466010,"sku":"BWCS-PBR520SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405072498778,"sku":"BWCS-PBR520SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PBR520SL-1.webp?v=1779369920","url":"https:\/\/batteryweb.com\/products\/audiovox-shuttle-replacement-battery-37v-650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}