Deepcyclesystems Reviews 98

TrustScore 1.5 out of 5

1.6

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Rated 1 out of 5 stars

Battery fails to hold charge after only some 30 cycles or so. When you open them they are terrible quality. Obviously just the cheapest of the cheap chinese export which was rebadged. Don't trust... See more

Rated 1 out of 5 stars

The company is an absolute joke, their products are cheap rubbish that is over, and when you disagree with the owner, he threatened to find you and sue you. He has poor communication skills and uses t... See more

Rated 1 out of 5 stars

DCS buy extremely cheap Chinese batteries, places their sticker on them, and then marks up the price. Go read the Australian Government's ARENA report on Lithium Batteries, which shows that DCS per... See more

Rated 5 out of 5 stars

Purchased my 4th dcs 120ah battery 15 days ago to complete my battery bank for my solar project. So far my experience with dcs batteries has been great. They are super light, quick to recharge, last 3... See more

Company details

Written by the company

Deep Cycle Systems Pty Ltd is a small family lithium battery technology company located in Tamborine Mountain, Australia. We specialise in the design and manufacture of lithium battery related technologies such as Battery Management Systems, Cell Management Systems, DC-DC charging systems and solar regulators. These systems are optimised to be installed internally inside battery cases. We also have our own cell testing and manufacturing arm by which we design and assemble lithium battery packs for our company under the ‘DCS Lithium’ brand and also private label batteries for other companies. Our focus is currently on the 12V & 24V Defence and Emergency Services market along with Marine, RV, Telecommunications, UPS and 48V standalone systems.


Contact info

1.6

Bad

TrustScore 1.5 out of 5

98 reviews

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Hasn’t replied to negative reviews

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Rated 1 out of 5 stars

I'm not a customer

I'm not a customer, but online research shows how dodgy of a company this is. For your own safety, don't buy.

April 29, 2026
Unprompted review
Rated 1 out of 5 stars

Scam

Battery fails to hold charge after only some 30 cycles or so. DCS buy extremely cheap Chinese batteries, places their sticker on them, and then marks up the price.

April 15, 2026
Unprompted review
Rated 1 out of 5 stars

Unsure where to begin exactly..

Unsure where to begin exactly... What I can say forsure is whatever you do.... avoid buying a battery from this scam of a company. They lie non stop and the batteries they claim to manufacture are cheap Chinese trash cans with a new sticker slapped on.... its sickening

April 16, 2026
Unprompted review
Rated 1 out of 5 stars

The company is an absolute joke

The company is an absolute joke, their products are cheap rubbish that is over, and when you disagree with the owner, he threatened to find you and sue you. He has poor communication skills and uses threats and intimidation to get his own way.

February 20, 2026
Unprompted review
Rated 1 out of 5 stars

DCS only places stickers on cheap Chinese batteries

DCS buy extremely cheap Chinese batteries, places their sticker on them, and then marks up the price.

Go read the Australian Government's ARENA report on Lithium Batteries, which shows that DCS performed the worst by far out of all batteries tested.

April 15, 2026
Unprompted review
Rated 1 out of 5 stars

Unfortunately 1 star is lowest review…

Unfortunately 1 star is lowest review available, negative stars more appropriate. The level of deception and illegality I personally experienced in my ongoing dealings with this ‘business’ beggars belief. I have no idea how this company is able to continue it’s misrepresentation as a legitimate MANUFACTURER , falsifies records, legal documents and misrepresents just about all aspects of his operation is able to continue ripping people off.

This guys shoddy products are going to result in loss of life if h3 allowed to continue. It is honestly a not a matter of ‘IF’ but WHEN.

January 15, 2026
Unprompted review
Rated 1 out of 5 stars

It offers products made in China on the…

It offers products made in China on the assumption that they do. They sue anyone who leaves a negative opinion of their products. And if they lose the case, they don't pay the affected person. And their products are of very poor quality compared to the price. And they can explode at any time due to poor quality.

April 21, 2026
Unprompted review
Rated 1 out of 5 stars

12V 80Ah Extreme is SHIT!

I got 12V 80Ah Extreme and test it, its horrible, it is THE CHEAPEST CRAP from China, with loose wires and I barely got 43Ah from it, with crappy messy output wave, because of CRAPPY PCB!

February 14, 2026
Unprompted review
Rated 1 out of 5 stars

DO NOT TRUST THIS COMPANY

Check out a video about Karl Jobst: Australia's Most Dishonest Company Needs To Be Stopped! Search it up on YouTube. DCS is the worst.

Untrustworthy, lies, Chinese made batteries and Un-Auatralian!

April 21, 2026
Unprompted review

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