I have just found a snag in using the M10 Camera inside it`s waterproof case, on a Motorcycle or Ebike . If you want to use an external battery and feed the supply through the plastic case into the micro USB , you cannot , as the clamp which secures the back sits right over the camera`s USB and HDMI Sockets . On the SJ4000 the clamp is on the top and it is possible to drill through the plastic case to get the supply through to the micro USB socket . The supplied battery only lasts an hour , so you need to carry a supply of these on a longer trip and charge these up from a portable battery pack . The alternative could be to dispense with the case altogether and hope the lense doesn`t get damaged .
Something to bear in mind if you cannot choose between the SJ4000 or the M10 .
As a matter of interest I have just received the battery charger c/w battery that I ordered from Amazon for £6.25 which I thought was `fake`because it cost less than the `Official`battery , it is exactly the same and also came with a postmark Greenford .You will remember that my `Official ` Camera from Banggood came with that postmark . Bit of a mystery , perhaps they all come from one place in the UK ?