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Battery Charger Circuits

High Current Lead Acid Battery Charger Circuits: 100 Ah to 200 Ah Range

Last Updated on September 5, 2026 by Swagatam 324 Comments

highcurrentbatterycharegrcircuit

The lead acid battery charger circuits I have explained in this article can be used for charging all types of lead acid batteries at a specified rate. This article explains a few lead acid battery charger circuits with automatic over charge, and low discharge cut off. All these designs are thoroughly tested and can be […]

Filed Under: Battery Charger Circuits Tagged With: Acid, Battery, Charger, Circuits, Lead

3 Simple Battery Desulfator Circuits Explored

Last Updated on August 21, 2026 by Swagatam 398 Comments

batterydesulfatorcircuit

In this article we investigate 3 simple yet powerful battery desulfator circuits, which can be used to effectively remove and prevent desulfation in lead acid batteries. The first method uses PWM pulses from a 555 PWM circuit using existing battery power itself, the second concept involves high voltage spikes, while the third design discusses desulfation […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Circuits, Desulfator, Explored, Simple

How to Recharge Dead Batteries

Last Updated on August 21, 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 and Earth Tagged With: Batteries, Dead, Recharge

Simplest BJT CC, CV Battery Charger Circuit with Trickle Charging (Adjustable)

Last Updated on August 18, 2026 by Swagatam 2 Comments

Today I will explain to you how this simplest constant voltage and constant current battery charger circuit works. This circuit is very nice for charging battery safely without damaging it. It has two main jobs, one is limiting high current and second is stopping over voltage. Audio/Video Representation Main Parts Used In Circuit In this […]

Filed Under: Battery Charger Circuits Tagged With: Battery, CC, Charger, CV, Simplest, Trickle

Low Battery Indicator Circuit Using Two Transistors Only

Last Updated on August 3, 2026 by Swagatam 211 Comments

lowbatteryindicatorcircuit 2

In the following post I have explained a simple low battery indicator circuit by using just two inexpensive NPN transistors. The main feature of this circuit is its very low stand by current consumption. The Circuit Concept We have so far seen how to make a low battery indicator circuits using a 741 IC and […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Indicator, Only, Transistors

Camper, Motorhome Battery Charger Circuit

Last Updated on July 28, 2026 by Swagatam Leave a Comment

offshore 2

In this post I have explained a battery charger circuit specifically designed for camper and motorhome applications, so it can serve as an effective camper/motorhome battery charger circuit operating through any shore power supply source. The idea was suggested by “music girl”. Battery Charger for Motorhomes Based on this customized battery charger circuit I would […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Camper, Charger, Motorhome

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