Multimeter Upgrade on Li-ion Battery With Charging From USB

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About: just do it yourself

How do i upgrade a multimeter

Step 1: All the Things You Need

  • Li-ion battery. 18650:

http://ali.pub/22bdhq or http://ali.pub/22bdjo . Other sizes: http://ali.pub/22bdmz or http://ali.pub/22bdnk

Step 2: If You Use a Charging Board With Protection, Use This Picture.

Step 3: Without Protection Will Look Like This.

Step 4:

Now you can throw away the 9-volt battery.

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    6 Discussions

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    Samuel Budiyanto

    5 months ago

    You must be careful, boost converter have an ripples voltage and if you not taming the ripple in high frequencies, many measuring will fail or give a false measure.
    I made it, but keep in the mind first; always put 100uH and rectify with 100nF + 100uF before the voltage come to the Multimeter.
    False reading comes when we driving microchips with bad input voltage (ripples in high frequencies).

    Greetings
    INDONESIA

    1 reply
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    GayatriA3

    1 year ago

    if we try to use 2 bms in series for some specifications, then how do i make connections?

    1 reply
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    rcs-al

    1 year ago

    How much current does the dc-dc converter drain on idle when the multimeter is off?

    1 reply
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    18650Factorrcs-al

    Reply 1 year ago

    close to 0 ,my multimeter could not measure it. If you worried about it, you can put the switch in the circuit break