Phil - Hate to worry you, but I also have 750 BlackVue and had the same voltage monitoring box as you - I had severe battery drain issues (needing recharging every 10 days).

Pulled out the PowerMagicPro and replaced with the new BlackVue battery unit and it gives around 20 hours of parking recording and no more battery issues.

Basil

What is the new battery pack you have and is it easy to fit? All LR cars from 1984
2021.5 Vogue SE D300 Carpathian Grey
2018 Vogue SE British Racing Green GONE

Its the [url] https://www.blackvue.com/power-magic-ultra-battery-b-124x/[/url] and its not cheap, but it is very good. Two wires to a 10 amp supply for best results (ignition switched) or for longer charging you can cigarette lighter socket it.

Bulky but fits under passengers footwell OK and heat produced is not too bad.

Make sure you get the X version, it is the newer and longer lasting version.

Oh, and I should have said, it comes with USB out so when you are fitting it attach a USB fly lead and you have phone / tablet charging even when ignition is off.

Thanks Basil, I’ll take a look at the battery solution.

Have had a look at the BlackVue battery and it is ..... £329! I’d rather fit a new RR battery for that amount  MY23 D350 HSE
On my 7th RR plus various other JLR vehicles