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Charging

Battery Current Indicator Circuit – Current Triggered Charging Cut off

Last Updated on June 1, 2026 by Swagatam 32 Comments

In this post I have explained about a simple battery current sensor with indicator circuit which detects the amount of current consumed by the battery while charging. The presented designs also have an auto cut off when the battery stops consuming current at its full charge level.. Why Current Drops as Battery gets Charged We […]

Filed Under: Indicator Circuits Tagged With: Battery, Charging, Current, Indicator, Triggered

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

Charging a Small NiMh Battery from Air

Last Updated on May 20, 2026 by Swagatam 1 Comment

charging NiMh battery from air 2

In this post we will try to investigate a circuit which can charge a small Ni-Mh battery by extracting radiant energy from the ether or air. I have explained more Discussing how to Derive Free 9V from Air – By Steven Chiverton Mr. Steven has devised an ingenious way of collecting energy from the air […]

Filed Under: Energy from Magnets and Earth Tagged With: Battery, Charging, NiMH, Small

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