For those with a need for USB power in their 7, I've just fitted this.
(Previously I had a 'power socket' there, and used a plug-in USB adaptor...)


(https://www.amazon.co.uk/dp/B077XY276Y/ref=pe_3187911_189395841_TE_dp_1)

Has 2x 2.4 Amp USB sockets.
It also shows the battery voltage.
I've fitted with an on/off switch.