{"product_id":"fitbit-sense-40mm-silver-aluminum-white-sport-band-battery","title":"Fitbit Sense 40mm – Silver Aluminum\/White Sport Band — Battery Service Needed (AS-IS)","description":"\u003cdiv style=\"margin:0 0 18px;padding:14px 16px;border:1px solid #fecaca;background:#fef2f2;border-radius:12px;color:#991b1b;font-weight:600;line-height:1.55\"\u003e⚠️ Sold AS-IS — disclosed defect: \u003cstrong\u003eBattery Service Needed\u003c\/strong\u003e. The battery is degraded and needs service\/replacement. Priced accordingly and covered by our 90-day return policy.\u003c\/div\u003e\u003cdiv class=\"dg-pdp-content\"\u003e\n\u003cp\u003e\u003cstrong\u003eBuy a certified refurbished Fitbit Sense 40mm in Silver Aluminum\/White Sport Band\u003c\/strong\u003e from $31 at Device Giant — every Sense 40mm is fully tested under our 25-point \u003cstrong\u003eTrueGrade\u003c\/strong\u003e inspection, ships unlocked-ready, and is backed by our 90-day warranty and free US shipping. The Fitbit Sense 40mm, released in 2020, is Fitbit's advanced health smartwatch, designed for comprehensive well-being tracking. It stands out with its innovative health sensors, including an EDA (electrodermal activity) sensor for stress management, an ECG app for heart health assessments, and an on-wrist skin temperature sensor. Beyond its health capabilities, the Sense offers built-in GPS for tracking outdoor activities without a phone, Fitbit Pay for contactless payments, and a vibrant AMOLED display with an always-on option. Its sleek design and comfortable sport band make it suitable for all-day wear. Compare grades, storage and carrier options below and save versus buying new.\u003c\/p\u003e\n\u003ch2\u003eSense 40mm key features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEDA Sensor for stress management\u003c\/li\u003e\n\u003cli\u003eECG App for heart health\u003c\/li\u003e\n\u003cli\u003eOn-wrist skin temperature sensor\u003c\/li\u003e\n\u003cli\u003eBuilt-in GPS\u003c\/li\u003e\n\u003cli\u003eFitbit Pay\u003c\/li\u003e\n\u003cli\u003eAlways-on AMOLED display\u003c\/li\u003e\n\u003cli\u003eUp to 6+ days battery life\u003c\/li\u003e\n\u003cli\u003eVoice Assistant (Alexa\/Google Assistant)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSense 40mm full specifications\u003c\/h2\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:640px\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eDisplay\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003e1.58 inches AMOLED, 336 x 336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eStorage\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003e4GB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eBattery\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003e159 mAh, Proprietary magnetic charging (approx. 12W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eBuild\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003eAluminum case, stainless steel sensor ring, silicone band, Water resistant up t\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eOperating system\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003eFitbit OS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eBiometrics\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003eHealth biometrics: Optical heart rate, Electrodermal Activity (EDA), Skin temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eDimensions\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003e40.4 x 40.4 x 12.4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 12px;border-bottom:1px solid #eee;white-space:nowrap\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"padding:6px 12px;border-bottom:1px solid #eee\"\u003e30 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eWhy buy a refurbished Sense 40mm?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSave big\u003c\/strong\u003e — a used Sense 40mm starts at just $31, well below retail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25-point TrueGrade tested\u003c\/strong\u003e — battery, screen, cameras, buttons and network all verified.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90-day warranty \u0026amp; free shipping\u003c\/strong\u003e on every Sense 40mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBetter for the planet\u003c\/strong\u003e — buying refurbished keeps e-waste out of landfills.\u003c\/li\u003e\n\u003cli\u003eAdvanced health tracking capabilities\u003c\/li\u003e\n\u003cli\u003eIntegrated GPS for phone-free workouts\u003c\/li\u003e\n\u003cli\u003eContactless payments with Fitbit Pay\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSense 40mm pros and cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComprehensive health and fitness tracking\u003c\/li\u003e\n\u003cli\u003eExcellent battery life for a smartwatch\u003c\/li\u003e\n\u003cli\u003eAccurate GPS tracking\u003c\/li\u003e\n\u003cli\u003eUseful stress management tools\u003c\/li\u003e\n\u003cli\u003eSleek and comfortable design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThings to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProprietary Fitbit OS limits third-party apps\u003c\/li\u003e\n\u003cli\u003eNo cellular connectivity option\u003c\/li\u003e\n\u003cli\u003eCharging is proprietary\u003c\/li\u003e\n\u003cli\u003eHealth features require Fitbit Premium for deeper insights\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCarrier compatibility\u003c\/h2\u003e\n\u003cp\u003eThis refurbished Sense 40mm is available \u003cstrong\u003eunlocked\u003c\/strong\u003e and compatible with GPS. Check the carrier selector above — we only show options we have in stock so you can buy the exact Sense 40mm that works on your network.\u003c\/p\u003e\n\u003ch2\u003eStorage options\u003c\/h2\u003e\n\u003cp\u003eChoose the Sense 40mm in 4GB. Pick more storage for photos, apps and offline media.\u003c\/p\u003e\n\u003ch2\u003eTrueGrade condition guide\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade A — Excellent:\u003c\/strong\u003e like-new, minimal to no visible wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade B — Great:\u003c\/strong\u003e light signs of use, fully functional.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade C — Fair:\u003c\/strong\u003e visible wear at the best price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAs-is \/ damaged:\u003c\/strong\u003e clearly described cosmetic or functional notes, priced accordingly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSense 40mm — frequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eIs the Fitbit Sense 40mm still worth buying in 2026?\u003c\/h3\u003e\n\u003cp\u003eYes — with EDA Sensor for stress management and a proven design, the Sense 40mm remains a great-value refurbished phone, especially at $31 with a 90-day warranty.\u003c\/p\u003e\n\u003ch3\u003eDoes the refurbished Sense 40mm come unlocked?\u003c\/h3\u003e\n\u003cp\u003eMost Sense 40mm units are sold unlocked and ready for GPS. Carrier-specific versions are clearly labeled in the carrier selector.\u003c\/p\u003e\n\u003ch3\u003eHow much does a used Sense 40mm cost?\u003c\/h3\u003e\n\u003cp\u003eAt Device Giant a refurbished Sense 40mm starts from $31, with the exact price depending on storage, carrier and TrueGrade condition.\u003c\/p\u003e\n\u003ch3\u003eWhat's included with a refurbished Sense 40mm?\u003c\/h3\u003e\n\u003cp\u003eYour Sense 40mm ships fully reset and tested with a compatible charging cable, a 90-day warranty and free shipping. Accessories vary by condition.\u003c\/p\u003e\n\u003ch3\u003eWhat do the condition grades mean?\u003c\/h3\u003e\n\u003cp\u003eSee the TrueGrade guide above — A (excellent), B (great), C (fair) and clearly-described as-is options, so you can pick the right balance of price and cosmetics for your Sense 40mm.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Fitbit","offers":[{"title":"4GB \/ GPS \/ Grade A — Excellent · bad battery","offer_id":50325337538789,"sku":"FBS40-GPS-4-SAWHTSB-A-BDBT","price":30.76,"currency_code":"USD","in_stock":true},{"title":"4GB \/ GPS \/ Grade B — Great · bad battery","offer_id":50325337571557,"sku":"FBS40-GPS-4-SAWHTSB-B-BDBT","price":34.78,"currency_code":"USD","in_stock":true},{"title":"4GB \/ GPS \/ Grade C — Fair · bad battery","offer_id":50325337604325,"sku":"FBS40-GPS-4-SAWHTSB-C-BDBT","price":30.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0287\/4913\/5965\/files\/469a5e2eecc0bee5abf1d9f3fb2e727c.png?v=1784298415","url":"https:\/\/devicegiant.com\/products\/fitbit-sense-40mm-silver-aluminum-white-sport-band-battery","provider":"Device Giant","version":"1.0","type":"link"}