Stihl Moisture Meter Fault?

[Wendelspanswick]

I bought a Stihl moisture meter about 6 weeks ago, put the supplied batteries in and was good to go, roll on a week and the meter is dead.

I checked the button cells with a meter and 1 cell is dead (0.2v), I guessed it was just duff cells so bought a blister pack of button cells, replaced all 4 in the meter and was good to go again.

Tried the meter again today and again it's dead!

I haven't checked the cells yet but I suspect another has failed.

Have I a faulty meter that is draining the cells or could it be the cells don't like the heat of being left in the cab of the van?

[cornish wood burner]

I bought a Stihl moisture meter about 6 weeks ago, put the supplied batteries in and was good to go, roll on a week and the meter is dead.

I checked the button cells with a meter and 1 cell is dead (0.2v), I guessed it was just duff cells so bought a blister pack of button cells, replaced all 4 in the meter and was good to go again.

Tried the meter again today and again it's dead!

I haven't checked the cells yet but I suspect another has failed.

Have I a faulty meter that is draining the cells or could it be the cells don't like the heat of being left in the cab of the van?

The cells certainly won't like the elevated temperature of a van in hot sun. It does seem a very quick discharge though. I would try keeping the meter at 20 deg to prove the point.