Digital voltage display, plugs directly into vehicle DC socket
Functions between 5v and 30v, suitable for 12v and 24v vehicles
LED indicators provide easy guide to battery condition, automatic 12v/24v circuit selection
Recommended in Auto Express magazine
Neat and efficient little gadget for keeping an eye on your battery's condition. Connects to the cigar lighter socket and shows state of charge at rest and level of supplied charge with engine running. Great for the price.
Having now had two alternator failures (once when I was miles from anywhere) I would have appreciated being pre-warned of a battery charging problem so I have been waiting for something as good as this for some time now. The ones I have had before were either unreadable or unreliable. This one is extremely well made and will stand a lot of knocking about in the car toolkit or glovebox. This device simply plugs into the 12v outlet (formerly called the 'cigarette lighter socket') and shows what is happening to the battery having a clear digital voltage meter and three LED indicators for Low, Normal and high Voltages. It is an extremely useful device to have but do not leave it in the garage - you need it in the car at all times - you never know when you might need it !!!
It does what it says. You can find out if your battery needs re-charging without opening the bonnet. It does not tell you if the battery is knackered. You would only know that by charging it and finding it made no difference. I found the lead a little short.
Does a neat job of keeping an eye on battery condition - especially if you drive an 'older' car. Wish I had one handy before the battery (I am told it was the 'original) died on my 12 year old car. Very, very simple to use (and interpret) if you read the instructions and allow for the fact that it can ever only be a very useful but unsophisticated guide. When you are getting no green, just the occasional amber and regular red - ACT.