To extend battery life of a Lithium battery (when not in use, say always in desktop mode) would be to not fully charge the battery but stop charging at 70% capacity.
Low heat also helps. Good to hear it does not get as warm.
By design, neither Mojo's charge the battery to %100 (8.4V).
Instead they charge to 8.2V and stop (about %90) in order to extend the life of the battery, there are also three thermal monitors to oversee the charge process.
There is an insulating
sponge between the battery and the circuit board, the battery is stuck to the upper shell of the case to keep the battery cool.
On Mojo2, battery charging is smart, under processor control this time.
It can slow charge or fast charge (similar to Hugo2), depending how much current is available from charger, and after a certain period of being left switched on and connected to a DAP, it would revert to "Desktop Mode" (again akin to Hugo2) it disconnects internal battery and runs on USB power only. If disconnected from DAP, then it just auto switches off after a period.
The power supply regulation and delivery had to be upgraded for this purpose, and as a result , Mojo2 has better channel seperation, together with DC coupling of DAC to analogue section, it has a more expansive stereo imagery and better bass definition. (what
@Dan Clark describes).