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Pick of the Camera Reviews

(Click the pictures for reviews & links) 


Yi 2 - Best Budget 4K 

Gitup Git2 (My Pick)

Xiaomi Yi

Dazzne P2

Yi Ultra 2.7K
Mobius (also works as a Dashcam)
Polaroid Cube+
Sena Prism Tube

My favourite USB battery power Pack

This is the excellent USB power pack I use when I travel.

2 x 2.1amp outputs. 8400mAh capacity.

Two digit Led display shows battery level


What SD CARD should I buy?

If you want an SD Card for your camera - these are the ones I use and recommend. 

I'd strongly recommend not to buy any SD cards off ebay - I've heard about too many issues with counterfeit cards - often sold on by unwitting resellers. My inbox regularly gets messages from people who bought a £150 camera then cheaped out and bought a £3 memory card on ebay - Then when it doesn't worth they blame the camera! It doesn't make any sense. Good memory is cheaper than it's ever been - see the links above.

A lot of HD cameras will not work properly with cards larger than 32GB (cards over 32GB are usually SDXC rather than the SDHC standard used by 32GB cards. SDXC cards use the ex-FAT system rather than FAT32 - in short they are a different standard). - so don't just buy the biggest card you can afford - read the specs in the manual to see what it accepts.


RECOMMENDED CARDS (for action cams - see dashcams below)

CLASS 10 UHS-1 CARDS (For HD Cameras)


U3 CARD (For 4K cameras)




The SD card in a dashcam is re-written over, more frequently than in other types of cameras. Some manufacturers void their guarantee if an SD card was used in a dashcam. So, no surprise, there are special High Endurance SD cards made just for's some.


VERY IMPORTANT. These links take you to the product, however Amazon have three different ways of selling. There's Amazon Direct - This means that you are only dealing with Amazon themselves, then there's other sellers that use Amazon's facilities - these show as Fulfilled By Amazon and finally there's Market Place sellers that advertise on Amazon, but operate independently.  I strongly recommend that you only use the first...the Amazon Direct - Sold By Amazon option. Even if it appears that you are paying a couple of £/$ more it is more than likely you are comparing the price of a real item against the price of a fake.

To give you an idea of the extent of the fake goods problem. In a 2016 survey by Apple - 90% of the 'Apple' chargers sold through Amazon - using the other the two methods..which includes the "Fulfilled by Amazon" option -  were found to be counterfeit....90%! 


« The Multi-Function Spy Cap | Main | The Cheapest 8" Android Tablet in the World? »

The Crocolis HD Extreme Cam - Longest review ever.

This is very likely going to be the only video review I'll make for a £100+ Action Camera and that's because when you get a camera that does pretty-much everything you want, then there is no need to go looking for another. The alternatives from GoPro, Contour and Drift cost considerably more and don't offer me anything extra that I need. I was really just looking for excellent quality 1080p 30fps and smooth 720p 60fps video with a nice sharp fish-eye lens in a waterproof case and an LCD screen - and that's exactly what I got.

The only significant issue with this camera is the sound quality. Normally this wouldn't be a concern because virtually all Action Cam footage gets overdubbed in post production anyway. But the problem with this camera is that the quality of it's video is so good that I am tempted to carry it around with me like a normal camcorder - unfortunately the wasp-in-a-tin-can sound quality means that it's not really a suitable as a camcorder substitute.

I think this might be the best (and longest) video review I've done so far. It's took a lot of time and effort and I think I've managed to cover everything that I wanted to. The only bits of info that may have got lost in the mix somewhere are the video formats - it's AVC .MOV - which imports into iMovie extremely quickly. One hour of video at 720p 60fps used up 3.63 GB of storage, the bitrates are CBR rather than VBR, the battery lasts about 2.5 hours and you can of course charge and record at the same time (very useful for time-lapse photography).

I'll just try and pre-empt some of the more predictable (but silly) questions before they get asked.

Does it work as a Webcam or have motion/sound activation? - No. Why? - Because it's not a Spy Cam it's an Action Cam. It's the same reason why your washing machine doesn't make toast.

If anyone desperately wants to see some original .mov footage from the camera then I'd appreciate it if you could suggest a reliable & free online place where I can post them. One that doesn't delete files automatically after a while. I would upload some 1080p and 720p60 clips, because youtube doesn't do justice to the brilliant video quality - the youtube clips look considerably softer and less vibrant than the originals. I didn't put the review on youtube in 1080p because you need a powerful computer to play 1080p flash video smoothly. *** Update - Clips added, see below***

I have to thank the 'extreme' skateboarding lads in Manchester - I'd imagine that they were more than a little bit concerned about the creepy middle-aged bloke asking if he could film them. Hopefully their Tony Hawks-esque videographer remembered my youtube channel name - please leave a message chaps if you do see this.

I'll be having a bit of a break for a few weeks before any more updates - but I can confidently say that the next video, whatever it is, will be a lot shorter and simpler than this epic.

This camera can be purchased from the nice people at Chinavasion - Here is the link


If you wanted to download some (unedited) sample clips to see the original quality of the video (before youtube has mangled it) you are in luck. Below are five clips, two are in 1080p30 and three are in 720p60. These are not the best framed/shot clips - but they are short enough to share.

If you are playing back these clips, you should download them first (right click) and then play them on your computer in Full Screen mode. I know that on my Macbook if I show the 720p60 stuff in a window then it only displays it at 720p30.

1080p30 Static

1080p30 Panning

720p60 Static

720p60 Panning

720p60 Skateboarders


UPDATE 26 September - Important extra info about sound quality.

I've discovered that the mic hole on the front bottom of the camera seems to do nothing at all. However opening the rear LCD screen door does effect things immensely. With the door shut tight, only the loudest sound gets through to the mic (like shouting into a pillow), however with the door open, sound gets recorded at an acceptable volume. It's still rather hissy and metallic sounding, but a infinitely preferable to the water-in-the-ears type sound you get with the door closed. To record sound the door doesn't need to be wide open - just left slightly ajar.

As a further experiment I also removed the dummy screw in the base of the camera but this had absolutely no positive effect on the muffled door-closed sound .

On the subject of sound I bought a small microphone with a 3.5mm plug and found out that the socket on the camera is actually 2.5mm (apologies for the factual error in the video). Luckily I have a 2.5mm to 3.5mm adaptor and have tested out the microphone and noticed no obvious difference between the hidden internal mic and my new mic. So some good news and some bad news - the sound is better than I thought, but seemingly cannot be improved upon (I suspect a low bitrate sound encoder). The sound test in the video when I'm talking into the camera is still an accurate demonstration as the door was open throughout. I may do a follow up video when my second test mic turns up in the post. 

Further Update 26 October

I've been informed (see the comments) that the Sound from an external mic is actually OK, it just needs to be seperated out from the sound from the internal mic which also gets recorded at the same time, messing it up. I haven't tried this out. 

Also that mystery screw in the base is a kind of heatsink (in screw form) - so leave it screwed in.

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Reader Comments (168)

Just snorkeled Molokini crater down to 20 feet.
No problems with camera.

May 6, 2013 | Unregistered CommenterSkyhook

Hello Techmoan, hello people.

I have problems with my new Extreme HD Action Cam!
The camera works so far, but on the LCD display is not much to see. It is much too bright (see photo)

What it could be? Is there a Firnware maybe I can re-record?

For information, I would be very grateful.


July 25, 2013 | Unregistered CommenterRay

Was wondering if anyone has managed to buy a replacement plastic base for this camera? (i.e. the bit where you screw onto your bike's handle bar) The base plastic snapped when my bike fell sideways against a wall but the camera's intact. I've tried contacting Chinavasion but they don't sell that part.

August 30, 2013 | Unregistered CommenterLewis

I oredered one of these from Verygood4U hich took 6 weeks to arrive because the first got lost in transit. When I turned the camera on I got 3 lights a black menu and I can't turn it off without removing the battery!! An SD card does not stay in the slot and, oh yes, they forgot to add the instructions which leads me to believe they are send out dodgy boxes. I am trying to return the item but as yet have not had an email from them apart from a garbled attempt to suggest how to get the camera up and running (reset the camera???)

Was really looking forward to getting this camera..


September 6, 2013 | Unregistered CommenterM Gordon

Want to buy mine for 50 quid MG? I've just bought as SJ1000 which suits me rather better.

September 6, 2013 | Unregistered Commentertom hardwick

Hi Tom
Can you tell me more... Is it in pristine condition? When did you buy it? Martin.gordon*at*

September 7, 2013 | Unregistered CommenterMartin Gordon

@ Martin - did you get the email I sent you a couple of days ago?

September 10, 2013 | Unregistered Commentertom hardwick

great review, thanks. I was searching the net for some video with the camera in action. From what I found, the camera doesn't really have good image stabilisation which is extremely useful and I could say must have on an action camera.

January 27, 2014 | Unregistered Commenterdan

Dear Techmoan,
Thank you very much for your Crocolis review, it was the decider in my buying one. Could you please confirm that you used your - SanDisk microSDHC Ultra 32GB, class ...10 card successfully in it? I bought a sandisk 16bgb 45mb/s extreme card but the camera does not recognize it.
Also does anyone know how to sort the problem of the memory card not being retained unless the door is shut - meaning I can;t use the aux / external microphone nor the tv out port?

February 3, 2014 | Unregistered CommenterBabs

Hi Techmoan, I found your review of the Crocolis on Youtube and that triggered me to purchase it. For a lot less money nowadays by the way, it was about € 75 @ Chinavision.
Thank you for that review!

February 14, 2014 | Unregistered CommenterAlsjemenou

I have a problem with my cam. At first it turned off randomly despite both memory and battery were ok. Then after some time it didnt read the video and didn't want to record any video despite lots of memory were available. So I decided to format it and after that it shows 00:00 minutes available and I can't record anything.

June 15, 2014 | Unregistered CommenterZjmicier

It's probably time to ditch the crocolis now and buy the much better, and cheaper, deliverySJ4000.

June 16, 2014 | Unregistered Commentertom hardwick

@tom hardwick: What if it'll be like Crocolis?

June 16, 2014 | Unregistered CommenterZjmicier

Dear Techmoan
To get the video off and save it on my Macbook - how do I do that?
I put a SDHD card in the Crocolis HD 1080p and then recorded and then took it out and then copied it onto my Macbook Passport.
But Quicktime says the file is corrupted?
What could the problem be or rather am I being stupid as I suspect and doing something wrong?

July 6, 2014 | Unregistered CommenterJonny

Its been a long time since I used this camera (I'm not even sure I still have it anywhere)...regardless, I always use FLV Crunch to convert files, perhaps it's worth trying this.

July 6, 2014 | Registered CommenterTechmoan

Great review and I bought one of these cameras and never regretted it. Couple of years ago once it was out of warranty, I decided to investigate the cause of the annoying clicking/rattling sound on the audio.
After stripping it down (internals mounted around box like battery compartment. Speaker wires need desoldering first) I noticed
the sensor/sealed lens array has an outer layer or filter (could be a U.V filter?) and an inner layer which rattles when camera is subjected to vibration. Can't remove it as it's sealed so be aware. I've heard other makes of action cam with similar rattling or clicking so it's not a 'one off'.
As Techmoan mentions in the review, audio isn't really an issue as most footage from these types of camera is often dubbed over using external sound recorder. (I use a Zoom H2)
Apart from the sound issue, I am still a fan of the crocolis and it does everything a GoPro 2 does.

September 9, 2014 | Unregistered CommenterTK42138

How much does this camera weigh ?

August 15, 2015 | Unregistered Commenterjoe

Camera weighs 196 grams with battery according to my digital scales.

August 17, 2015 | Unregistered CommenterTK42138

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