Switched itself off numerous times - Avoid

I was recommended this baby monitor whilst pregnant, and although it is expensive, you can't put a price on the safety of your newborn!
The parent unit of the monitor has repeatedly switched itself off with full battery and no warning. You assume all is quiet in your nursery, when in fact it has just turned off!
I have lost all faith in this monitor as my son could have been upset, or worse still choking or in distress and we would have been none the wiser.
Has been returned to the manufacturer and am assuming it is a faulty batch - be aware.