On Mon, 30 Jul 2018 13:34:30 +0100, Martin Brown
wrote:

On 30/07/2018 13:19, Michael Chare wrote:
I bought some LR44 1.55v batteries on ebay for my Barclays Pin sentry
card reader. They don't work!

Using my digital multimeter the voltages of the 4 I tried are 0.471 1.30
1.43 1.47

What voltage should I get from a new battery?

A fresh silver oxide one should be around 1.6v under no load. See

http://data.energizer.com/pdfs/silveroxide_appman.pdf


The card reader was showing "Low Battery".* Fortunately after I rubbed
the old batteries with a tissue the card reader started to work so I
have been able to make my online bank payment.

Did you try rubbing the new batteries? I'm also a Barclays customer
and I had some problems replacing the batteries. Unfortunately, I
cannot remember what the problem was but I think it was connections.