Either way I am surprised that they consume that much power. My watch runs continuously for 5 or 10 years on a lithium button cell. I wonder whether they would work, for example, to measure the voltage change of cells in an Minnesota winter, or in a Death Valley summer. If the circuitry can handle it, one might need better than an alkaline 9 volt.
I seem to remember that a lot of these meters run for around 40 hours on a battery…
Just for reference the 830D has a low battery indicator:
I’ve seen a lot of cheap meters where the readings start screwing up before the battery indicator comes on…
Second. Quite a lot, to the point that now I came to use weird V /R reading as low-battery indicator.
Interesting. I’ve not had any problems with mine other than the cheap probes and sockets.
I have noticed the same thing with the HF meters. Digital calipers also surfer from the same low battery misreadings.
I have noticed the display taking its own sweet time in displaying the measurement reading means time for new battery.
The guaranteed way of knowing your caliper batteries are dead is to need to take a measurement and not having any spare batteries… I guarantee that your batteries will be dead… |(
Just remember with those Harbor Freight DMM's that "No Replacement Parts are Available":
:) This is directly off the back of the user manual.
-Garry
For replacement parts call their customer service number! :bigsmile:
Sure there are, The meters are Free!
Best replacement parts 
Later,
Keith
you can say that again
Going today for a set of free replacement parts. Today’s Sunday paper had coupons for both a free meter and free tape measure!
The best part of using an extra meter for replacement parts is that each part is expertly stored in an intuitive location inside the storage container. Also you can get an accurate indication of your parts inventory with just a quick glance. 