Faster you fly the faster you burn your battery up. Not a good idea at all.
As a general rule if I I have VLOS and the Battery is low , will cancel RTH and fly back, however if VLOS is sketchy will allow RTH to do its magic until clear VLOS has returned and than cancel RTH.
Low battery for beginners is scary: RTH gives you the confidence that your Drone can even make it back .
In order to cancel the RTH with low battery and you have to be confident that your Orientation is correct , you have to be able to see the Screen clearly and if there is Glaring Sun on you screen it can really alter that confidence.
For me RTH is giving me the Quickest Orientation possible and low battery is the signal for me to cancel it and Speed on back in linear fashion.
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