Review of the Aqualung i300C Diving Computer 2025

This article reviews the Aqua Lung i300C, highlighting its user-friendly design, versatile features, and excellent value as a reliable dive computer for recreational and beginner divers.

Category	Weight	Aqua Lung i300C Rating
Display and Readability	0.25	4.0/5
Features and Functionality	0.25	4.5/5
Ease of Use	0.20	4.5/5
Durability and Build	0.15	4.5/5
Value for Money	0.15	4.5/5
Overall Score	1.00	4.40/5

Final Verdict: ★★★★☆ (4.40/5)

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Introduction

The Aqua Lung i300C is a budget-friendly dive computer designed to deliver simplicity, reliability, and essential features for recreational divers. With its user-friendly interface, Bluetooth connectivity, and durable construction, the i300C stands out as an excellent choice for beginners and casual divers who value ease of use and convenience.

This compact dive computer offers multiple dive modes, including air, Nitrox, and freediving, along with the ability to sync dive logs seamlessly via the DiverLog+ app. Its straightforward design and intuitive navigation make it a trusted companion for safe and enjoyable underwater adventures. Whether you’re just starting out or looking for an affordable, dependable device, the Aqua Lung i300C is built to enhance your diving experience.

Design and Build

he Aqua Lung i300C features a compact and streamlined design that prioritizes comfort and durability, making it well-suited for recreational divers and beginners.

Compact and Lightweight: Its low-profile design ensures a comfortable fit on smaller wrists and reduces drag underwater, enhancing ease of movement.
Durable Construction: Built with rugged materials, the i300C withstands the wear and tear of frequent use and harsh underwater conditions.
Four-Button Navigation: The intuitive four-button interface allows for easy access to settings and dive data, even while wearing gloves.
High-Contrast Display: The screen is designed for clear readability, presenting critical dive metrics in large, easy-to-read fonts.
Adjustable Strap: A comfortable and secure strap ensures a snug fit for divers of all sizes.
User-Replaceable Battery: The battery can be easily replaced by the user, eliminating the need for professional servicing and reducing downtime.

The Aqua Lung i300C’s durable and practical design ensures reliability and comfort, making it a dependable companion for recreational diving adventures.

Display and Readability

The Aqua Lung i300C is designed with a practical and clear display that ensures critical dive data is easy to read and interpret, even in challenging underwater conditions.

High-Contrast Screen: The monochrome display features bold, high-contrast digits that are easy to read in varying lighting conditions, including low visibility.
Simple Layout: The straightforward screen layout prioritizes essential dive metrics such as depth, dive time, no-decompression limits, and tank pressure.
Backlit Display: The screen includes a backlight for enhanced readability in low-light environments or night dives.
Intuitive Indicators: Clear visual alerts and intuitive graphics make it simple for divers to monitor dive status and respond to alarms.
Customizable Views: Divers can select from multiple screen configurations to display the information they find most important.

The Aqua Lung i300C’s emphasis on readability and simplicity makes it a reliable tool for divers who need quick and easy access to their dive data, ensuring a safer and more enjoyable diving experience.

Features and Functionality

Key Features:

Multiple Dive Modes:
- Air and Nitrox: Supports Nitrox mixes up to 50%, providing flexibility for extended dive times.
- Gauge Mode: Tracks depth and time for advanced users who prefer external dive tables.
- Freediving Mode: Includes features specific to apnea diving, catering to breath-hold divers.
Bluetooth Connectivity:
- Syncs seamlessly with the DiverLog+ app, enabling divers to review, manage, and share dive logs via a smartphone or tablet.
Safety Features:
- Audible and visual alarms for depth, no-decompression limits, and ascent rates help divers maintain safe practices underwater.
- Automatic altitude adjustment ensures accurate metrics in varying dive locations.
User-Replaceable Battery:
- Equipped with a battery that divers can replace themselves, minimizing downtime and maintenance costs.
- A battery life indicator helps plan replacements proactively.
Dive Log Memory:
- Stores up to 24 dives, allowing divers to track and review their recent diving history directly on the device.
Pre-Dive Planning:
- Features a planning mode for reviewing no-decompression limits before dives, aiding in preparation and safety.

Ease of Use

Four-Button Navigation:

The simple, tactile four-button interface ensures easy access to menus, settings, and dive data, even when wearing gloves.
Logical menu structure minimizes confusion and allows quick navigation.

Automatic Activation:

Activates upon immersion, eliminating the need to manually start the dive computer.
Ensures the device is always ready to log dive data without user intervention.

Bluetooth Connectivity:

Easily syncs with the DiverLog+ app, allowing divers to manage and share dive logs, update settings, and review metrics through a smartphone or tablet.

Clear Display:

Large, high-contrast digits and a simple layout make it easy to read critical dive data at a glance.
Backlit screen enhances visibility in low-light conditions or during night dives.

Pre-Dive Planning:

Provides a pre-dive planning mode to help divers review no-decompression limits and prepare for safe dives.

User-Replaceable Battery:

Simple battery replacement reduces downtime and ensures the dive computer remains operational between trips.

Why It’s Easy to Use:

The Aqua Lung i300C combines an intuitive interface, automatic functionality, and seamless connectivity to deliver a hassle-free experience for divers of all levels. Its focus on simplicity and reliability makes it an ideal choice for beginners or those seeking a straightforward dive computer.

Battery Performance

User-Replaceable Battery:

The i300C is equipped with a user-replaceable CR2450 lithium battery, allowing divers to perform quick and easy replacements without the need for professional servicing.
This feature reduces maintenance costs and ensures the device remains operational between dive trips.

Battery Life Indicator:

A built-in battery level indicator provides clear warnings when the battery is running low, giving divers ample time to replace it before their next dive.

Extended Battery Life:

Designed to last up to 300 dives or several years of typical recreational use, depending on dive frequency and usage of additional features like the backlight.

No Data Loss:

Maintains dive log data and settings during battery replacement, ensuring a seamless user experience.

Why It Stands Out:

The Aqua Lung i300C’s reliable battery performance, combined with user-replaceable functionality and efficient power management, ensures it is always ready for your next dive. This convenience makes it particularly appealing to beginner and recreational divers looking for a hassle-free, dependable dive computer.

Value for Money

Affordable Pricing:

Positioned as a budget-friendly option, the i300C provides critical dive computer functions without the premium price tag of high-end models.

Essential Features:

Offers multiple dive modes (air, Nitrox, freediving) and Bluetooth connectivity, which are often found in more expensive dive computers.
Includes safety features like depth alarms, no-decompression tracking, and ascent rate alerts, ensuring peace of mind during dives.

Durable and Reliable:

Rugged build quality and a user-replaceable battery ensure long-term usability, reducing maintenance costs over time.

Bluetooth Connectivity:

Seamless syncing with the DiverLog+ app allows divers to manage logs and settings conveniently, a feature that enhances the overall user experience.

Beginner-Friendly Design:

The straightforward interface and automatic activation make it an ideal investment for new divers who want a reliable and easy-to-use dive computer.

Low Maintenance Costs:

The ability to replace the battery yourself, combined with a durable design, ensures the i300C remains cost-effective throughout its lifespan.

Who It’s Best For:

The Aqua Lung i300C is perfect for recreational and beginner divers looking for a dependable, feature-rich dive computer without overspending. It provides everything needed for safe, enjoyable dives, offering exceptional value in its class.

Bottom Line: The Aqua Lung i300C balances affordability, functionality, and durability, making it a smart investment for divers seeking essential features at a reasonable price.

Pros and Cons

Pros

Budget-Friendly: Offers excellent functionality at an affordable price, making it ideal for recreational and beginner divers.
User-Friendly Design: Simple four-button navigation and an intuitive interface ensure easy operation, even for first-time users. Automatic activation eliminates the need for manual setup before dives.
Multiple Dive Modes:Supports air, Nitrox, gauge, and freediving modes, providing versatility for various diving styles.
Bluetooth Connectivity: Seamless syncing with the DiverLog+ app allows for easy dive log management, setting adjustments, and sharing dive profiles.
Durable Build: Rugged construction ensures reliability in challenging underwater conditions.
User-Replaceable Battery: Quick and easy battery replacement minimizes downtime and eliminates the need for professional servicing.
Clear Display: High-contrast screen with large digits and backlighting ensures excellent readability in low-light or murky conditions.

Cons

Limited Advanced Features: Lacks the high-end features found in more expensive models, such as GPS navigation or air integration.
No Rechargeable Battery: While user-replaceable, the i300C relies on disposable batteries, which may not appeal to divers seeking eco-friendly options.
Smaller Dive Log Capacity: Stores up to 24 dives, which may not be sufficient for divers who prefer extensive log storage without frequent syncing.
Monochrome Display: Lacks the vibrant, full-color screens available on premium dive computers, though it compensates with clarity and readability.

Key Takeaways:

Strengths: Affordable, easy to use, and reliable, with multiple dive modes and Bluetooth connectivity enhancing convenience for recreational divers.
Limitations: Best suited for beginners and casual divers; may not satisfy those seeking advanced or technical features.

Comparison

If you’re deciding between the Shearwater Peregrine, Cressi Leonardo, and Aqua Lung i300C, this detailed comparison explores their features, functionality, and value for recreational divers. These three models cater to varying experience levels and budgets, helping you find the ideal dive computer for your needs.

Visit the full comparison page to dive deeper into the details of these models:

Shearwater Peregrine vs. Cressi Leonardo vs. Aqua Lung i300C.

This resource provides insights into display quality, dive modes, user-friendliness, connectivity, and value for money, ensuring you make an informed choice for your next dive computer.

Overall Rating

Category	Weight	Aqua Lung i300C Rating
Display and Readability	0.25	4.0/5
Features and Functionality	0.25	4.5/5
Ease of Use	0.20	4.5/5
Durability and Build	0.15	4.5/5
Value for Money	0.15	4.5/5
Overall Score	1.00	4.40/5

Summary:

The Aqua Lung i300C scores highly for its ease of use, Bluetooth connectivity, and multiple dive modes, offering excellent value for recreational divers and beginners. While its monochrome display may not rival premium models, it remains clear and functional, complemented by its rugged design and affordability.

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Overall Rating: ★★★★☆ (4.40/5)