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Switching the multimeter to a lithium-ion battery with charging

Electronics
Added 31 a comment
Switching the multimeter to a lithium-ion battery with charging

Those who are tired of changing the 9 volt battery on the multimeter are offered to remake it with a 18650 lithium-ion battery with charging from the smartphone’s power supply.

What is needed:



Or as an option

Battery charge

1 PC.



Or purchase

If you purchased a charging board with built-in protection, then the circuit looks like this.

If the board without protection will look like this.

We connect the structure in iron with a hinged mounting


After checking in the multimeter, near the location of the built-in battery, cut a hole for micro usb charging.

We isolate the boards and put them in a container from under the batteries.
We check again in operation.
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Added 31 a comment

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31 a comment
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Do not distort: ​​there you have a completely different proposal.
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Have you tried to count? ;) Before offering nonsense ... ((
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here what I thought ... but what if you charge the multimeter from those random voltage measurements on its probes ... not, well, it’s clear that there is an error compensator, a stabilizer and not on all measurement ranges ... but the idea is ....
-1
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the greatest minds gathered to discuss which batteries to insert into the multimeter xaxa
0
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So I'm more inclined to this.
0
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If the battery lasted longer to replace the display, then the conclusion is obvious.

The obvious conclusion is that he not only disassembled the display with a door, but also something that shortens it? )))))
0
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Measure the current in standby mode and everything will become clear. Perhaps the keychain constantly communicates with the machine, the distance is farther and consumption too. If the battery lasted longer to replace the display, then the conclusion is obvious.
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A very necessary thing ....and at the expense of the crown, for example, I was tortured to buy them ... especially in the scales !!!!
+1
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And I would put an LC-filter on the DC / DC output, for clean power.
0
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The alarm panel on the machine with an LCD display dripped, pushed down by the door. I ordered another from the Chinese. While waiting for the start, the battery sits down. The display came. Soldered tracks. Everything works. Only an AAA battery dies in 2 days.
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I had to put the switch on the kitchen scale in the same way because of the fast discharge of the batteries.
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I have two powerful headlamps. One on T6 is simpler ... The other on L2 ... When they are dressed on their heads, there is a box with two 18650 batteries at the back of the head. There is also a USB port on it so that it can be used as an external recharge (Power Bank). So, in T6 a button with a latch (mechanical shutdown), And the fact is that on L2 a button without a latch, a bunch of unnecessary modes and turning off the "program" (Press and hold) ... So, I also cut into it the usual disconnect button, because I rarely use it. And in a couple of months he ate out two 18650 for 2000 each !!! After the alteration, it stopped ....
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Quote: Ivan_Pokhmelev
Do you always turn it off with a button or leave it to auto power off?

I always turn it off with a button, but it has an electronic shutdown (hold it for 2-3 seconds and it turns off), maybe the dog is buried here. Most likely you will have to do a mechanical power off.
P.S. I’ll find the second device, I’ll surely measure the current consumption from the battery in the automatic shutdown and manual shutdown modes. Thanks for the tips.
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If there is a second device, measure the current consumption from the battery in auto power off mode. It should be no more than 5 μA.
-1
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Quote: MNS1961
holds a full charge for no more than 2 months

Do you always turn it off with a button or leave it to auto power off? In the latter case, due to improper operation of the microcircuit (key leak), there may be a small consumption in an allegedly disconnected state.
0
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There is a lithium-ion crown, it is expensive, but it is worth it.
You can do it yourself. But that's another story.
+1
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Thanks to the author for the topic. it is also very relevant for me personally.
I have a Victor VC9808 + multimeter. Batteries tormented to buy, of course, most likely, Chinese (such as "crown" (even for 250 rubles and more) holds a full charge for no more than 2 months (not frequent use - 20 minutes a day). Then the device starts to "foolishly" lying when measuring capacitance of capacitors, inductance of coils and small values ​​of resistance.
I would be very grateful to everyone who shares “SHARIT” in this matter (especially to Ivan Pokhmelev, because during the communication on the site, I trust him more in electronics matters. I consider him a professional in this field) if you tell me how to get out of provisions.
I would not want to pick the case, although I can do it very carefully.
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Then it's clear)
+1
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Quote: popvovka
But still, is the battery on the "street" chtol?

The copyist did not reflect this important detail, I had to watch the video, the author put the battery in the upper part of the tester.
Author 0
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Have you seen someone on the street, in public transport, in a public place walking with a laptop? He goes to the subway, opens the laptop and chatts ... The laptop has long become the same PC tied to the network, only dead, so no one bothers with dead batteries now, they work from the network ...
0
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Khabibra,
I work with acb laptops, walkie-talkies, and medical devices.
But still, is the battery on the "street" chtol? Then you can turn on from the network adapter.
+2
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I worked in production for 18 years, and now I work with a multimeter.Unit UT60С was at the production site, and when it was working for about 5 hours, the salt one left for a month, later switched to batteries, they sat down for a week. Each had several, one in work, two in reserve.
Now mastech B830, vintage. Certainly enough for more than a month, but not half a year for sure!
At home, Unit b830, it has a battery, lasts for a long time, and sometimes I use it. Self-discharge battery plays a trick.
+9
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So what? And the converter, meanwhile, is constantly “nibbling” the battery.
Author 0
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For what? The multimeter itself turns off.
Author +1
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The batteries from the laptops of the BU are now like dirt, as a rule they are not working, the two batteries are normal and will work for a long time with proper charging, so the price issue is debatable ...
+1
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Does not eat. And in a year he won’t eat. Believe me. For me, a cartoon is a daily work tool. You just need to remember to put the switch in the OFF position after finishing work. So there is no point in embedding a battery in the cartoon, which is more expensive than the cartoon itself. On Ali (cartoon) you can buy from 80 rubles.
+4
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The switch in the battery circuit has traditionally been forgotten. ((
+2
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It depends on how you use it. A cheap battery with constant use, I mean salt, a squeaker with a squeaker. Measurements of voltage and current pull a little of course. The usual B830 of any company, eats in a month. Alkaline course is longer, but the price is two times higher.
+1
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I do not understand a few points:
- and where is the 18650 battery ?;
- the flat battery in the photo is a lithium polymer;
+4
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Such a cartoon from Krona can safely work for 5-6 years. Given the cost of Krona (about 50 rubles), it can be changed at least once a week, if desired.

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