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Battery Charger Circuits

Automatic Battery Full Cut-Off Latching Circuit with Trickle Charging

Last Updated on June 3, 2026 by Swagatam Leave a Comment

In this post I will explain one useful SCR relay battery overcharge cut off circuit, which also has automatic latching and small trickle charging feature, so now when battery becomes fully charged then charger disconnects automatically, but still a tiny current keeps going into battery slowly. Main Features Main interesting thing here is the SCR […]

Filed Under: Battery Charger Circuits Tagged With: Automatic, Battery, Charging, Full, Latching, Trickle

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

3-Step Automatic Fast Battery Charger/Controller Circuit

Last Updated on May 24, 2026 by Swagatam 272 Comments

3stepbatterychargercircuit

Generally it is noticed that while charging batteries people hardly pay any special attention toward the procedures. For them charging a battery is simply connecting any DC supply with matching voltage with the battery terminals. A fast battery charger circuit charges a battery with enhanced speed so that it is charged in less time than the specified period. […]

Filed Under: Battery Charger Circuits Tagged With: Automatic, Battery, Charger, Controller, Fast, Step

How to Recharge Dead Batteries

Last Updated on May 20, 2026 by Swagatam 12 Comments

howtochargediscardedbatteries

In this post I have explained how to recharge and use bad, defective discarded batteries using an innovative battery charging process invented by John Bedini. Lead acid batteries can sometimes be a problem to get rid of. They can also be high priced to upgrade. In case discarded in the wrong way, they have a […]

Filed Under: Battery Charger Circuits, Energy from Magnets Tagged With: Batteries, Dead, Recharge

LiFePO4 Battery Charging/Discharging Specifications, Advantages Explained

Last Updated on May 20, 2026 by Swagatam 14 Comments

LIFePO4 compressed

While Li-Ion and Lithium polymer electrolyte (LiPo) batteries possess unmatched energy density, Lithium-based batteries are costly to produce and need meticulous handling along with a cautious charging. With the advancement of nanotechnology, the manufacturing process of the cathode electrode for these batteries has seen a substantial improvement. The break through nanotechnology-based high-load LiFePO4 cells are […]

Filed Under: Battery Charger Circuits, Electronics Theory Tagged With: Advantages, Battery, Charging, Discharging, LiFePO4, Specifications

BQ24295 Smart Battery Charger IC with Boost + OTG

Last Updated on May 18, 2026 by Swagatam Leave a Comment

This BQ24295 IC is like a super smart charger chip. This one is not just for charging battery, but also doing many other jobs like boost converter, USB detection, power path control, and even OTG (host power supply). So we can say that this is a full battery charging and power management IC. Let us […]

Filed Under: Battery Charger Circuits, Datasheets and Components Tagged With: Battery, Boost, BQ24295, Charger, OTG, Smart

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