Battery Level Indicator





Introduction: Battery Level Indicator

About: I love writing, I make video in MY UPLOADED VIDEOS channel in Youtube for my instruction, and i love making something.

Hi everyone, It's me Balsuryana!. I'am back with some electronics projects! In this projects, i will show you how to make a Battery Level Indicator.

I got this idea because i need this tools for indicate my powerbank battery level, so i made this tools. No more talking, LET'S MAKE IT!

Step 1: What You Will Need?

  • HT3786 (LCD drive power detection)
  • Battery level LCD (6 legs LCD) (Image 2 and 3)
  • 2 Ceramics capacitor (capacitor code: 104)
  • 220 uf, 10v Capacitor
  • Some cables


  • Soldering iron

Step 2: The Circuits

This is the circuits, you just follow this circuit. Please click the image for zoom the image and more visible.

  • C1 = 220 uf
  • C2 = Ceramic capacitor
  • C3 = Ceramic capacitor

Step 3: Solder the Circuits

Before soldering, you can follow the circuits using breadboard, just insert the Legs to the breadboard, and you can modification the circuits. If you want to solder the circuits, you can use perfboard or you can make the pcb.

If you solder it without anything, it's look like image! :)

Step 4: Let's Test It

If you finish solder your circuits, connect the negative and positive input to battery. This tools can turn on using less than 3 Volts. You can add resistor to the positive input, so you can use more voltage from battery to indentification more voltage battery level.

And thats it! this instructables is finish!

Thanks for look my works

I hope you like this

Please like, subscribe, share or vote this Instructables.

Thanks for look my works! :D



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27 Discussions

nice work

can we use other LCD like calculator lcd?


1 year ago

can it take 9.8 volts ? please answer

1 reply

It can. you just need to added the resistor to the input voltage


1 year ago

and if it does, does it take NI-MH ? please answer


1 year ago

Looks like all the components you have used are second hand as I can see the old tin still on the legs of your components ?
So I think you just used an old one and took it apart just to rebuild it out of the box it originally came in

2 replies

before i take the image and upload it to Instructables, i am test the circuit first and its works, so i unsolder again the circuit. after that, i go to take the picture and i solder it again.

Thanks for look my works:n)

balsurana - Ozzy called it correctly - what vendor / store would sell such obviously used parts.


1 year ago

thank you wery clear connection

This is compact and easy. But I don't know why I could not find the HT3786 datasheet in English, there's only in Chinese. Do you mind to share it if you had it already? THANKS.

5 replies

No, i talk with seller in electronics store around me. And the seller recommend me to buy the LCD and all of the components and he talk to me how to make it. so buy this and the seller give me all of the component. so i make it and upload the steps to my Instructables.

BTW, thanks for look my works:)

Perhaps you could ask the person at the store to give you the exact part number for that LCD... Or maybe that person could do an instructable. After all, it seems to be his/her design anyway!

Thanks for your reply, I think I'll do it soon.

The hardware needed to make this battery level indicator is so specialized (i.e. the screen is not widely available at all) that the instructable is simply a teaser without any real way of making it! It is really a shame....

3 replies

I also saw similar chargers on Aliexpress, but your link (and others I found on Aliexpress) sells the complete charger, and not only the LCD panel. It would be silly to buy the charger that you linked to and dismantle it to build the exact same charger which you just dismantled!

The bottom line is that before this instructable can be useful, a link should be given to buy the LCD-panels only.

Hi bgordon, i get the lcd from electronics store around me, im not buy this online. So i dont know the link to buy the parts, sorry.

Btw,Thanks for look my works