Bought one of these a while ago, very good, gives battery voltage and records voltage over a period of time, also has charging and starting diagnostics, all from an app... well worth the money on these battery hungry cars...

A 10mm spanner and two mins to fit...

https://www.aliexpress.com/item/3294538325...4f2dqDlT47 Pete
I now have permission from the boss to use Y.O.L.O. Enjoy life
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

I bought one of these from Ebay: https://www.ebay.co.uk/itm/144168908075?ha...Sw46JhFjLt

Excellent bits of kit and give you that bit of confidence if you're troubleshooting all sorts of issues, and knowing when you've got rid of that thing that might have been draining the power.

I have the BM2 that Batfink posted above which I've been using for a few years now. It's a great little bit of kit.

I haven't seen the Lancol one before and it looks like it has the same functionality as the BM2 at a lower price.

Thanks for posting  Kev

2014 L405 RR Vogue SE 4.4 SDV8 in Corris Grey
2010 L320 RRS HSE 3.0 TDV6 in Stornoway Grey