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Battery Charger Circuits

Battery Charging Fault Indicator Circuit

Last Updated on May 17, 2026 by Swagatam 130 Comments

li ionfaultindicator

In this article I have explained a battery status indicator circuit which can be also used as a battery charging fault indicator circuit. The idea was requested by Mr. Faizan. The Design The idea presented here takes care of all the parameters required for charging a battery ideally and safely. Referring to the shown battery […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charging, Fault, Indicator

Charging a Cellphone battery with a Laptop Battery

Last Updated on May 17, 2026 by Swagatam 5 Comments

cellphonechargerfromlaotpbatt 1

The post presents a simple circuit that may be used for charging a cellphone battery with a laptop battery. The idea was requested by Mr. Gyashuddin. Recharging Cellphone Battery with Laptop Battery hello sir my self md gyashuddin I want to know that it is passible to built a circuit which can ,recharge my cell […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Cellphone, Charging, Laptop

Laptop Charger Circuit from 12V Battery

Last Updated on May 30, 2026 by Swagatam 142 Comments

In this post I have explained a simple car laptop charger circuit for charging laptops from a 12V car battery using a IC 555 based boost converter. The idea was requested by one of the avid readers of this blog. Making a 12V to 19V Converter May I request you for a circuit diagram for […]

Filed Under: Battery Charger Circuits Tagged With: 12V, Battery, Charger, Laptop

Super Capacitor Charger Theory and Working

Last Updated on May 17, 2026 by Swagatam 241 Comments

supercapacitorchargercircuit

In this post I have explained a super capacitor charger circuit for charging super capacitors which converts a 12V car battery voltage to an elevated 16V for charging a bank of super capacitors. The idea was requested by Miariver. Super Capacitor for Peak Power Compensation  First thanks for keep publishing this blog is very helpful, […]

Filed Under: Battery Charger Circuits Tagged With: Capacitor, Charger, Super, Theory, Working

Self Optimizing Solar Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 261 Comments

solarmpptchargercircuit

In this post I have explained a simple IC 555 based self optimizing solar battery charger circuit with buck converter circuit that automatically sets and adjusts the charging voltage in response to the fading sunlight conditions, and tries to maintain an optimal charging power for the battery, regardless of the sun ray intensities. Using a […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Battery, Charger, Optimizing, Self, Solar

Lithium Polymer (Lipo) Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 73 Comments

24vbatterychargercircuit

In this post I have explained a simple lithium polymer (Lipo )battery with over charge cut off feature. The idea was requested by Mr. Arun Prashan. Charging  a Single Lipo Cell with CC and CV I came across your work on “​Bicycle Dynamo Battery Charger Circuit” in Homemade circuit design blog. It was really informative. I […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Lipo, Lithium, Polymer

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