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Description
Hulk 4x4 DC-DC Dual Battery Charger 12/24V 40AHulk 4x4 DC DC Dual Battery Charger 12 24V 40A (HU6540) Hulk Professional DC DC Battery Charger 12 24V 40amp Automatically selects the input: Alternator, Solar, DC based on active input with no manual switching required Ignition connection allows low input selection and Solar MPPT regulator allows to work with 12V, 18V or 24V Solar Panels 7 Stage Multi Chemistry Switchmode charging provides charging for all standard Lead acid, GEL, AGM, Calcium and
Hulk 4x4 DC-DC Dual Battery Charger 12/24V 40A (HU6540)
Hulk Professional DC - DC Battery Charger 12/24V 40amp
- Automatically selects the input: Alternator, Solar, DC based on active input with no manual switching required
- Ignition connection allows low input selection and Solar MPPT regulator allows to work with 12V, 18V or 24V Solar Panels
- 7 Stage Multi-Chemistry Switchmode charging provides charging for all standard Lead-acid, GEL, AGM, Calcium and Lithium auxillary batteries
- Dual charging modes enables to work with fixed voltage (standard 12V or 24V alternators) and variable voltage alternators (smart)
- Wide voltage input of between 9 - 42 Volt provides an option of charging from both 12V and 24V vehicle systems
- Using the temperature sensor, continually adjusts its charge rate to suit battery temperature protecting it against over-charging and over-heating
- Can be connected in parallel to provide more output when using high output alternators
- IP67 Rated, sealed against dust or water ingress and safe to operate in -20°C to +85°C
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.2 ★★★★★
Based on 1294 reviews
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Product Reviews
★★★★★ 5
Healthy Sea plant magnesium
I’ve been researching magnesium and ran across the benefits of magnesium from sea plants. Since many people lack the proper amounts of magnesium this type of magnesium seems healthier than magnesium from the earth.
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Reviewed in the United States on March 3, 2026
★★★★★ 3
You need magnesium
It helps with so many things, and most of us don’t get enough.
Do your research, and make your choice. This is a good starter option, but that is just my opinion.
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Reviewed in the United States on August 18, 2025
★★★★★ 5
Great Source of Magnesium
I can take these and they don't bother my stomach.
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Reviewed in the United States on February 10, 2026
★★★★★ 4
Quality product
I’ve been taking the Ocean Magnesium 200mg Aquamin with B6 for a little over a month now, and I’ve really enjoyed adding it into my routine. I’ve tried several types of magnesium supplements in the past, but this one stood out to me for a couple of reasons: it’s made with Aquamin (derived from sea minerals), it’s vegan, and it comes in an easy-to-take capsule form.
The first thing I noticed was the packaging. The bottle is sturdy, seals well, and the label is clear and easy to read. I like that it’s straightforward about the ingredients—no unnecessary additives or confusing blends. The capsules themselves are an average size, not too big or hard to swallow, which I appreciate since I take them at night before bed.
As far as digestibility, this has been one of the gentlest magnesium options I’ve tried. Some brands I’ve used in the past left me with an upset stomach, but I haven’t had that issue here. I also appreciate that the capsules don’t have a strong aftertaste or odd smell, which has sometimes been the case with other supplements.
I also really like that this formula includes vitamin B6. Even though I can’t measure exactly what difference that makes, I like knowing that it’s formulated with complementary nutrients in mind. It feels more thoughtfully designed than a basic one-ingredient pill.
Another nice thing is that the bottle provides a full 60-count supply, which lasts me two months since the serving size is just one capsule per day. That makes it more cost-effective than other brands where you need to take multiple pills.
I can’t make specific claims about the effects, but I will say that I enjoy having this as part of my daily wellness routine. It’s simple, clean, and feels like a product I can stick with long-term. I also like knowing it comes from a whole food, plant-based source, which aligns with how I try to approach my overall diet.
Overall, I’d recommend Ocean Magnesium to anyone looking for a well-made, vegan-friendly magnesium option. The capsules are easy to take, gentle, and thoughtfully formulated. It’s one of the few supplements I’ve tried that I look forward to continuing with regularly.
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Reviewed in the United States on August 25, 2025
★★★★★ 5
I have not gotten any leg cramps since taking this
Healthy minerals help bone maintensnce
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Reviewed in the United States on January 25, 2026