Brands Guides About
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed) — main product image
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)
Apple

Apple MR9C3LL/A Series 9 45mm Smartwatch (Renewed)

★★★★★4.6 (12 reviews)

The Apple Watch Series 9 (45mm, Renewed) puts an S9-powered health hub and Double Tap gesture control on your wrist at a meaningful discount over new pricing.

$240.00*$420.24Save 42%
✓ In Stock on Amazon.com
View on Amazon

*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Apple Watch Series 9 in 45mm is Apple's most capable general-purpose smartwatch, built around the S9 dual-core chip that enables both a significantly brighter display and the new Double Tap gesture interface. For iPhone users who want a single device to handle health monitoring, fitness tracking, safety features, and daily convenience — notifications, Apple Pay, Siri, navigation — the Series 9 is the current benchmark in the Apple Watch lineup. The 45mm case strikes a practical balance between screen real estate and wearability, giving workout metrics, maps, and text previews enough room to read comfortably at a glance. The Renewed designation here means you're accessing that same Series 9 hardware at a reduced price point, inspected and verified for performance by the refurbisher.

On the health side, the Series 9 carries a suite of FDA-cleared and wellness-grade sensors: ECG for AFib detection, blood oxygen measurement, wrist temperature sensing that feeds both cycle tracking and general well-being trends, and multi-stage sleep tracking that distinguishes between REM, Core, and Deep sleep. Fall Detection and Crash Detection add a safety net that has real-world utility beyond fitness — particularly for solo outdoor activities or commuting. The aluminum case and Sport Loop band combination keeps the overall weight low for all-day wear, and with 18 hours of rated battery life, the watch handles a full active day with workouts before needing its nightly charge. Fast charging support means a short charging window during a shower or desk session tops the battery significantly, making the daily charging routine genuinely unobtrusive.

Key Features

CARBON NEUTRAL - An aluminum Apple Watch Series 9 paired with the latest Sport Loop is carbon neutral. Learn more about Apple’s commitment to the environment at apple.com/2030.

WHY APPLE WATCH SERIES 9-Your essential companion for a healthy life is now even more powerful. The S9 chip enables a superbright display and a magical new way to quickly and easily interact with your Apple Watch without touching the screen. Advanced health, safety, and activity features provide powerful insights and help when you need it. And redesigned apps in watchOS give you more information at a glance.

ADVANCED HEALTH FEATURES-Keep an eye on your blood oxygen. Take an ECG anytime. Get notifications if you have an irregular heart rhythm. See how much time you spent in REM, Core, or Deep sleep with sleep stages. Temperature sensing provides insights into overall well-being and cycle tracking. And take note of your state of mind to help build emotional awareness and resilience.

A POWERFUL FITNESS PARTNER-The Workout app gives you a range of ways to train plus advanced metrics for more insights about your workout performance.

INNOVATIVE SAFETY FEATURES-Fall Detection and Crash Detection can connect you with emergency services in the event of a hard fall or a severe car crash. And Emergency SOS lets you call for help with the press of a button.

Specifications

Brand
Apple
Model
Series 9 (MR9C3LL/A)
Case Size
45mm
Case Material
Midnight Aluminum
Band
Midnight Sport Loop (fits 145–220mm wrists)
Chip
Apple S9
Connectivity
Wi-Fi, GPS
Operating System
watchOS
Battery Life
Up to 18 hours (up to 36 hours Low Power Mode)
Health Features
Blood Oxygen, ECG, Sleep Stages, Temperature Sensing, Cycle Tracking, Heart Rate
Safety Features
Fall Detection, Crash Detection, Emergency SOS
Display Size
45mm
Condition
Renewed

Pros & Cons

👍 Pros

  • The S9 chip enables a noticeably brighter always-on display compared to Series 8 — easier to read outdoors and in bright ambient light without raising your wrist.
  • Double Tap gesture control is a genuinely useful hands-free interaction option that works reliably in real daily situations where the other hand is occupied.
  • Comprehensive health tracking — ECG, blood oxygen, sleep stages, temperature sensing — consolidates multiple wellness monitoring functions into a single wearable.
  • The 45mm case size provides a larger display that improves readability for navigation, workout metrics, and text notifications without feeling unwieldy on most wrist sizes.
  • Renewed pricing makes Series 9 hardware accessible at a lower entry cost than new retail while delivering current-generation performance and features.

👎 Cons

  • 18-hour battery life means daily charging is non-negotiable — users who want to track sleep and wear the watch through a full workout day need to plan a dedicated charging window.
  • Exclusive Apple ecosystem lock-in means the watch has zero functionality with Android phones and limited functionality without an iPhone nearby for cellular-free models.
  • The aluminum case, while lightweight, is more susceptible to cosmetic scratching than stainless steel variants — a consideration when buying a renewed unit that may already have accumulated case wear.
  • watchOS app selection, while strong, keeps certain third-party health integrations limited compared to what some competing platforms offer in open health data sharing.

Frequently Asked Questions

Renewed means the watch has been professionally inspected, tested, and restored to working condition — typically by Amazon or an authorized refurbisher. Battery health, display, and sensors are verified functional. You may see minor cosmetic wear on the case or band, but performance should match a new Series 9. Renewed products typically include a limited warranty and are a legitimate way to access Apple Watch Series 9 hardware at a reduced price.
The Apple Watch Series 9 requires an iPhone running iOS 17 or later for setup and core functionality. It cannot be set up or used with Android devices. If you're an Android user, this watch is not compatible with your phone. iPhone users get the full feature set including Siri, Apple Pay, iMessage notifications, and Precision Finding for iPhone.
The Series 9 includes blood oxygen measurement, an ECG app (AFib detection), sleep stage tracking (REM, Core, Deep), wrist temperature sensing for menstrual cycle insights and general well-being trends, and heart rate monitoring including irregular rhythm notifications. These are FDA-cleared features for ECG and AFib detection. Blood oxygen and temperature readings are wellness indicators rather than clinical diagnostic tools — they're most useful for identifying trends over time, not as standalone medical measurements.
Double Tap is a gesture introduced with the S9 chip that lets you interact with the watch by pinching your thumb and index finger together twice — without touching the screen. It works for answering calls, stopping timers, scrolling through Smart Stack widgets, and other common interactions. In practice it's useful when your other hand is occupied — carrying groceries, holding a coffee — and it responds reliably after a short learning period. It is not a replacement for all touch interactions but adds genuine convenience for the most common quick actions.
Apple rates the Series 9 at up to 18 hours of typical use, or up to 36 hours in Low Power Mode. Fast charging is supported — the watch charges to approximately 80% in about 45 minutes with a compatible USB-C magnetic charger. For most users, overnight charging covers a full day of use including workouts and sleep tracking, though sleep tracking requires charging discipline during the day or use of Low Power Mode overnight.

Related Products