Is it Normal?
I bought this multimeter a year ago and I have found that it eats batteries like candy, looked the video "EEVblog 1533 - How To Estimate Product Battery Life" and hooked other multimeter to measure current consumption and found 2.68 mA when shut down
| Supply Voltage (V) | Current (mA) | Equivalent Impedance (Kohm)
0.61 0.47 1.27
1.51 1.13 1.33
4.11 2.68 1.53
Tried measuring resistance across the battery terminals and found the same 1.8 Kohms in forward and backward measuring.
When saw "EEVblog 1449 - What Causes Excess Battery Drain? (BM235)" I started looking for components and my main suspect at the moment is the 100uF tantalum capacitor as I could no measure any capacitance in the terminals (measured in PCB), at the moment I am waiting for a hot tweezers before starting to make an intervention.
I think is a faulty capacitor and not the diode as it is a very consistent resistance, but I would like to know your opinion as I do not have a lot of experience with these things.