Accutire MS-51GB Bluetooth Battery Monitor

Works perfectly, easy to keep track of battery power status. It's great that it sends text message when the charging level is critical.

I had intended to buy 4 of these, one for each car, as 2 of them are used infrequently and invariably have flat batteries after a week or two and lose compute/alarm memory on recharge. I decided to risk only the cost of 2 until they proved to be of use, I'm glad I did. Both cars are parked outside windows, one at the front of the house, one at the side, neither signal is received on my iPad or iPhone immediately by the window a metre or so from the car with the bonnet down, let alone any where in the house I may be using them. I can get a signal with the bonnet up, but that is hardly practical. I will see if I can find or make a direct connection from the battery to the cab of the cars to see if the signal manages a better path through the glass. On the strength of this I have to award zero stars as they are not fit for purpose, but of course, we have to leave at least one.