{"product_id":"vertu-constellation-quest-replacement-battery-37v-1500mah-li-ion","title":"Vertu Constellation Quest Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertu Constellation Quest — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion cell built to replace the original battery in the Vertu Constellation Quest. The Constellation Quest is a luxury touchscreen smartphone, and this battery restores power to aging or degraded units. Fit dimensions are 65.80 × 43.90 × 5.10mm — confirm these against your original cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConstellation Quest platform fit:\u003c\/strong\u003e\n    The Constellation Quest uses a single fixed-format Li-ion cell connected directly to an internal charge IC. The connector pinout, cell dimensions, and BMS voltage thresholds must match the original exactly — this cell meets those specifications.\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 compatible hardware. The BMS accepted the full 4.2V charge ceiling and held a stable output voltage across screen-on and modem-active load states.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging is applied to an uncalibrated 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 Constellation Quest reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Constellation Quest uses a fuel gauge IC that builds its charge estimate from the old cell's discharge curve stored in memory. When a new cell goes in, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The result is a percentage readout that drifts or reads high early and then drops suddenly. One full discharge-charge cycle — down to automatic shutdown, then a complete charge to 100% — forces the fuel gauge IC to relearn the curve against the new cell.\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 below the phone's minimum operating threshold under a high-draw load — typically the modem transmitting or the display at full brightness. The fuel gauge still shows 20–30% because it's reading average voltage, not instantaneous voltage under load. The cell cannot sustain voltage under that spike, so the phone shuts down as a protective measure. After a full calibration cycle, the fuel gauge maps this voltage cliff correctly and the shutdown point drops to the expected near-zero level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409491066970,"sku":"BWCS-NK4LSL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409491099738,"sku":"BWCS-NK4LSL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409491132506,"sku":"BWCS-NK4LSL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK4LSL-1.webp?v=1778611065","url":"https:\/\/batteryweb.com\/products\/vertu-constellation-quest-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}