Leomo Type S Power Mount Battery Pack

I recently purchased the Leomo Type S "Fitness computer", mainly for use as a navigation unit, since it is compatible with Google maps and third party bike specific navigation software.  If you haven't already, you can read about my first impressions here.

I didn't initially purchase the extended battery, because I figured that the built in battery would last more than long enough.  Truth be told, it does.  Even with Bluetooth, WiFi, ANT+, GPS, and LTE enabled, it will still last over 6 hours while playing music and doing active navigation.  Realistically, this means I can easily go for a round trip ride to somewhere 2 hours away with buffer to spare.  I think that's not bad at all, but I decided that more is better.   After all, what if I did go on the 2 hour trip yesterday, and forgot to charge the battery last night after I got home?  Or what if I want to go on an all day ride?  It's probably also better for the internal battery to have fewer charge cycles.  

Anyway, I am posting some photos here in case anyone is considering the purchase.

Unit from above, with the bumper installed.  (The bumper does not really protect the battery).

Unit from below.  Note that the bike mount came standard.

The battery is thicker than the unit itself, and attaches as follows:.  The non-latching side slides in, and you fold the unit down on the other side until the latch engages.  It is very sturdy, and I don't think it will come separate even under fairly heavy shocks.  

If you compare the original "Multi sport mount" mount with the Power Mount, you will see that there is no cut-out, so the rear facing camera is pretty much completely blocked by the power mount.  (Not a big deal for me).  

Both units from the bottom:

Both units from the top:

Power mount before attaching to anything:

Original packaging:

There is a button on the power mount that will light up (up to) three white LEDs to indicate the charge status of the power mount itself.  Once you attach it to the Type S, it will begin to charge that automatically which means that basically the Type S will always have a 100% charge as long as the power mount has at least some charge.  This also means that you don't need to charge the Type S and power mount separately, just plug the USB C charger into the Power Mount, and it will take care of charging the phone too.  

It looks quite fat in the picture, but in actuality, you won't even notice the additional depth once you mount it on your bike since you are almost always looking down on the screen from above.  

Update:

One thing to note form actual usage.  The Type S can be used for quite a while with the standard internal battery, and of course the extended battery back gives it even more run time - but if you charge the unit and the battery back up and then leave it in a drawer, the extended battery will run down.  As long as it is connected to the main unit, it will turn on every few moments, attempt to charge it, and then go back to sleep.  Over the course of a day or so, this will drain the extended battery pack.  This leaves you with two options:

a. Leave the extended battery pack connected to the Type S, but keep it plugged into a charger, or

b. Unplug both units from the charger, and then separate them so that the battery pack does not wake up.

Other than that, it works fantastically.  

I had considered buying a second battery, so I could have one charging in my bag while I used the other one, etc. - but it lasts so long that this is not necessary.  I rode all the way from Tokyo to Nagano without charging the battery very often.  

Another quick note - this battery has a USB C port for charging, but I don't believe that other devices can be charged from this port, so it is only useful for charging the Leomo.