Ocean Gear Guide | Underwater Scooter Reviews, Diving Gear Comparisons & Buying Guides

asiwo Manta 40M review

Quick Summary: The ASIWO Manta 40M is a dual-thruster sea scooter designed for snorkelers, freedivers, and recreational scuba divers seeking lightweight underwater propulsion without bulky gear. With a depth rating of 40 meters (131 feet), three distinct speed settings reaching up to 3.3 mph (1.5 m/s), and a total weight of just 7.7 lbs (3.5 kg), it delivers practical water assist that fits inside standard carry-on luggage. If you want to extend your bottom time, battle mild coastal currents, or tow an action camera smoothly, the Manta 40M is one of the most balanced mid-range sea scooters on the market today.

When you're swimming through ocean currents or covering long distances over a reef, your legs do most of the work. That heavy kicking burns through your air supply when scuba diving and drains your stamina quickly while snorkeling. That's where an underwater scooter—often called a sea scooter or DPV (Diver Propulsion Vehicle)—changes the game. Instead of kicking constantly, you hold onto twin handles and let a electric motor pull you effortlessly through the water column.

In this comprehensive evaluation, we're dissecting the ASIWO Manta 40M (Model: EL-SS01). We'll look at its real-world speed, depth safety, battery endurance under actual ocean conditions, real user feedback from Reddit and Trustpilot, official manual guidelines, and whether this model deserves a spot in your dive bag.

Check Live Pricing on the Official ASIWO Manta 40M

The ASIWO Manta 40M dual-thruster underwater scooter features a streamlined body with integrated dual trigger throttles.

1. What Is the ASIWO Manta 40M?

The ASIWO Manta 40M is a compact, handheld underwater propulsion vehicle designed for recreational water sports. Powered by two electric thrusters mounted on either side of a central body frame, it provides forward thrust to tow a swimmer or diver smoothly through water.

Unlike older, heavy steel-and-lead DPVs that weighed upwards of 40 to 60 pounds and required specialized dive boats to deploy, the Manta 40M is built around modern high-density plastics, aluminum motor housings, and a removable lithium-ion battery pack. The entire unit weighs approximately 7.7 lbs (3.5 kg) with the battery installed. That lightweight structure makes it easy for teenagers, adult snorkelers, and traveling scuba divers to carry down a beach ladder or haul onto a kayak.

Key Features at a Glance

• Maximum Depth Rating: 40 meters / 131 feet (ideal for Open Water and Advanced Open Water recreational dive limits).
• Top Speed: Up to 1.5 m/s (3.36 mph / 2.9 knots) on high gear.
• Speed Control: 3 gear settings (Low, Medium, High) toggled right from the handle triggers.
• Battery Capacity: 126Wh (25.2V, 5.0Ah) airline-compliant lithium-ion battery.
• Run Time: Up to 35–45 minutes of real-world intermittent use (depending on gear selection and diver drag).
• Buoyancy Profile: Slightly positive buoyancy (floats slowly to the surface if released).
• Camera Mount: Integrated GoPro-style action camera mount on the top housing.

2. Design, Ergonomics, and Build Quality

When you hold the Manta 40M for the first time, you notice the symmetrical wing design. ASIWO purposefully styled this scooter after a manta ray. The wide stance puts the dual prop guards out past your shoulders, which helps stabilize your body in the water and prevents prop wash (turbulent thrust) from blowing directly onto your chest or dive mask.

The handles are positioned at a comfortable neutral angle. You don't have to bend your wrists awkwardly to hold the triggers down. Each handle features an embedded button trigger. To engage the motors, you must press both triggers simultaneously. If you drop the scooter or let go with even one hand, the internal relay cuts power instantly to both propellers within a fraction of a second. This double-trigger system prevents runaway scooters and keeps loose fingers away from spinning blades.

Dual-side prop guards protect swimmers' fingers and underwater life from contacting internal blades.

Material Selection and Water Sealing

Saltwater is unforgiving. It attacks electrical contacts, corrodes aluminum, and degrades low-grade rubbers. ASIWO built the Manta 40M using high-impact ABS plastic for the outer wing frame, while the motor assemblies are encased in treated alloy housings designed to withstand hydro-static pressure up to 4 bar (40 meters depth).

The battery bay utilizes a dual O-ring seal system. The inner battery core locks into place with a mechanical latch, ensuring that water cannot reach the electrical pin contacts even if the outer shell experiences minor flex under deep pressure. Based on the official user manual, inspecting and greasing these O-rings with silicone grease before every dive day is critical for maintaining long-term waterproof integrity.

3. Speed, Thrust, and Underwater Performance

How fast does the Manta 40M actually pull you? That depends heavily on your body profile, your gear setup, and water currents. Let's look at real-world expectations across different environments.

3-Speed Power Delivery

The scooter operates across three gear levels, easily switched by double-pressing the control button during operation:

1. Gear 1 (Low Speed): ~0.8 m/s (1.8 mph). This mode offers maximum battery efficiency. It's ideal for relaxed reef browsing, taking steady video footage, or accompanying young swimmers.
2. Gear 2 (Medium Speed): ~1.2 m/s (2.7 mph). A balanced cruise speed. It easily overcomes mild surface chop or gentle tidal drift without draining the battery prematurely.
3. Gear 3 (High Speed): ~1.5 m/s (3.3 mph). Maximum thrust from both motors. You feel an immediate pull on your arms, dragging you through open water at a pace faster than standard fin-kicking speeds.

In practice, if you're wearing a thick 5mm wetsuit, heavy scuba tank, weight belt, and BCD, your hydrodynamic drag increases significantly. On High gear, a fully equipped scuba diver will move somewhat slower than a bare-skinned snorkeler in trunks. However, even with dive gear, the thrust is more than enough to relieve your leg muscles entirely, helping reduce air consumption rates during long bottom times.

4. Battery Life, Charging, and Airline Compliance

One of the biggest pain points with underwater scooters is battery logistics. Some high-power DPVs use giant 300Wh or 500Wh sealed batteries that cannot legally be brought onto passenger airplanes. ASIWO solved this by sizing the Manta 40M battery at 126Wh (Watt-hours).

Airline Carry-On Rules: Under international FAA and IATA transport guidelines, lithium-ion batteries between 100Wh and 160Wh are allowed in carry-on hand luggage with airline approval (limit 2 per passenger). You cannot put the battery in checked baggage. Simply unlatch the battery pack from your Manta 40M frame, pack the scooter chassis in your checked suitcase, and take the battery unit with you into the aircraft cabin.

Real-World Battery Endurance

While marketing sheets often quote "up to 45 minutes of run time," operational time underwater varies based on how you ride:

• Continuous High-Gear Riding: Expect roughly 20 to 25 minutes of non-stop full throttle.
• Mixed Gear / Intermittent Use: If you use Gear 1 and 2 while gliding, stopping to look at coral, and pulling the triggers only when moving between spots, a single charge easily lasts 35 to 45 minutes on a single dive session.

Recharging takes roughly 2 to 3 hours using the standard AC wall adapter supplied in the box. The charger features an LED indicator light (Red for charging, Green for complete).

5. Official User Manual Guidelines & Maintenance

According to the Official ASIWO Manta User Manual (EL-SS01), following a strict post-use rinse protocol is mandatory if you want your scooter to survive salt water exposure over several seasons.

Essential Maintenance Checklist from the Manual:

1. Freshwater Soak: After every ocean immersion, submerge the complete unit in a tub of clean, fresh warm water for at least 15 to 20 minutes. Pull the triggers several times while submerged in fresh water to flush trapped salt crystals out of the trigger housing.
2. Dry Before Opening: Never unlatch the battery compartment while the outer body is wet. Towel off the entire frame first to prevent water droplets from falling onto the exposed gold pin terminals.
3. O-Ring Care: Clean the silicone rubber O-rings around the battery hatch after every few uses. Apply a thin coat of marine silicone grease to keep them soft and pliable. Replace the O-rings immediately if you spot cracks or flat spots.
4. Long-term Storage: Never store the battery fully depleted. Charge it to roughly 50%–70% capacity before storing it in a cool, dry environment, and top it up every 3 months.

6. Community Feedback & Real-World User Experiences

To give you an unbiased view beyond standard factory claims, we analyzed user discussions across scuba forums, community threads, and review aggregators.

Reddit Diving Community Insights

On diving gear subreddits, including discussions like r/DivingGearReview's ASIWO EL-SS01 user thread, real owners frequently highlight its balance of weight versus power. Snorkelers and shore divers appreciate that they don't feel exhausted dragging the unit across sandy beaches.

Key takeaways from community discussions include:

• Portability Praise: Users love that it easily fits into a carry-on backpack or small duffel along with a mask, fins, and snorkel.
• Buoyancy Safety: Beginners consistently report feeling safer knowing that if they slip or panic, the scooter slowly ascends rather than sinking into deep ocean trenches.
• Realistic Expectations: Diver threads emphasize that while it won't replace a $3,000 professional technical DPV meant for cave exploration, it performs remarkably well for shallow reef cruising, freediving photo shoots, and family vacation outings.

Trustpilot Rating Breakdown

ASIWO maintains a solid rating profile on Trustpilot's official ASIWO review page, reflecting responsive customer service regarding replacement batteries, shipping inquiries, and warranty fulfillment.

Verification of customer satisfaction and service track record from Trustpilot reviews.

7. Hands-On Video Demonstration

To see how the ASIWO Manta handles underwater maneuvering, water displacement, and speed changes, watch this detailed video review:

8. Technical Specifications Matrix

Here is a detailed spec breakdown of the ASIWO Manta 40M (EL-SS01):

Specification	ASIWO Manta 40M Detail
Model Number	EL-SS01 / Manta 40M
Max Rated Depth	40 meters / 131 feet
Top Speed	3.3 mph (1.5 m/s) max (3 adjustable gear modes)
Weight (With Battery)	7.7 lbs (3.5 kg)
Motor Thrust	Dual Electric Thrusters (Up to 9kgf total thrust)
Battery Capacity	126Wh (25.2V / 5000mAh) Rechargeable Lithium-ion
Charging Duration	2 to 3 Hours Fast Charging
Operating Temp	0°C to 40°C (32°F to 104°F)
Buoyancy	Positive Buoyancy (Floats to surface)
Mounting Options	Built-in GoPro / Action Camera bracket

9. Photography & Action Camera Integration

For many divers, capturing stable video underwater is difficult because swimming motions cause camera shake. The Manta 40M solves this by acting as a heavy, stabilized glide plate for your action camera.

The molded bracket on top accepts all standard action camera mounting thumbscrews (compatible with GoPro Hero models, DJI Osmo Action, Insta360, and underwater LED light arms). Because the scooter pulls you smoothly through calm water, your footage looks noticeably smoother than handheld filming while kicking fins. The wide frame keeps your hands positioned far to the left and right, ensuring your fingers never block the wide-angle camera lens.

10. Shipping, Warranty, Payment, & Support Policies

When purchasing underwater equipment online, knowing the manufacturer's backing and logistics policies provides peace of mind. Here is a breakdown of what ASIWO and their authorized distributor provide:

• Shipping Policy: Standard orders ship directly from regional fulfillment centers. According to the Official Shipping Policy, transit times typically range between 3 to 7 business days within domestic territories, complete with tracking numbers.
• Warranty Coverage: The product comes backed by a limited manufacturer warranty covering defect claims on the frame, motor drive, and control electronics. Full terms can be reviewed on the Official Warranty Policy Page.
• Payment Options: Flexible purchasing is supported at checkout, including major credit cards (Visa, Mastercard, Amex, Discover) and secure online payment gateways. You can review available options during the Secure Checkout Portal.
• Customer Support: If you need technical assistance, spare O-rings, or charger replacements, you can contact support directly through the ASIWO Customer Contact Page.

11. Pros and Cons Analysis

What We Like (Pros)

• Airline Compliant: 126Wh battery easily fits within standard airline carry-on limits.
• Dual Trigger Safety: Immediate motor shutoff if either hand releases the grip.
• Positive Buoyancy: Won't sink to the ocean floor if dropped accidentally.
• Lightweight Chassis: Easy for teenagers and adults to haul around at 7.7 lbs.
• Action Camera Mount: Integrated GoPro mount provides steady, smooth underwater filming.

Considerations (Cons)

• Run Time on Max Gear: High-speed mode drains the battery in ~20-25 minutes of continuous pull.
• O-Ring Maintenance Required: Demands diligent rinsing and greasing to maintain waterproof seals long term.
• Not for Commercial Tech Diving: Built for recreational limits (40m max depth), not deep cave/wreck penetrations.

12. Who Should Buy the ASIWO Manta 40M?

Ideal For:

• Snorkelers & Shore Swimmers: If you want to explore offshore reefs without exhausting your leg muscles, this gives you effortless surface and shallow cruising.
• Recreational Scuba Divers: Perfect for open-water divers wanting to save air and cover more ground during shallow or mid-depth reef dives up to 130 feet.
• Underwater Content Creators: Anyone looking for smooth, stabilized track shots of marine life without camera shake.
• Vacation Travelers: Diver enthusiasts who travel frequently by air and need a lightweight scooter that fits inside carry-on luggage limits.

Not Recommended For:

• Technical & Cave Divers: Divers requiring 2-hour long runtimes at extreme depths (>150 ft) should invest in heavy commercial DPVs.
• Users unwilling to do gear maintenance: If you don't like rinsing salt off gear or greasing rubber O-rings, salt corrosion will reduce its lifespan.

13. Frequently Asked Questions (FAQ)

Can you take the ASIWO Manta 40M on a commercial airplane?

Yes. The battery pack is rated at 126Wh, which falls directly within the 100Wh–160Wh carry-on allowance set by most commercial airlines (including FAA/TSA standards). Make sure to unlatch the battery and keep it in your carry-on luggage, while storing the scooter chassis in your checked baggage.

What happens if I accidentally let go of the scooter while underwater?

The Manta 40M features positive buoyancy and an instant-off dual trigger safety mechanism. The moment you release either hand, the propellers stop spinning completely. The scooter then slowly floats upward toward the surface, allowing you to swim up and retrieve it safely.

How deep can I dive with this sea scooter?

The unit is depth-tested and sealed for depths up to 40 meters (131 feet), which matches the maximum limit for recreational open-water scuba diving.

How long does the battery take to charge?

It takes roughly 2 to 3 hours to charge a completely drained battery pack using the included fast charger plug.

Can I charge the battery while it is still inside the scooter?

It is recommended to remove the battery from the chassis when charging. This allows proper heat ventilation during the fast-charge cycle and lets you inspect the inner dry chamber for any moisture or debris.

14. Final Verdict and Recommendation

The ASIWO Manta 40M strikes an excellent balance between portability, dive depth capability, and underwater thrust. It avoids the bulk of industrial DPVs while offering significantly better build quality and speed control than cheap pool toys. Its positive buoyancy, dual-trigger safety design, and airline-friendly 126Wh battery make it a reliable choice for recreational divers, snorkelers, and traveling families.

If you take care of the O-rings and rinse it thoroughly with fresh water after ocean dives, the Manta 40M will serve as a dependable dive companion that extends your time and range underwater.

Order the ASIWO Manta 40M Direct with Official Warranty Coverage