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Battery Charger Circuits

Battery Cut Off Charger Circuit Using a Single Relay

Last Updated on May 17, 2026 by Swagatam 31 Comments

simplestbatterychargercircuit

Amazed to hear this! Yep that’s actually possible, you would need only one relay and a handful of diodes to make a simplest one relay automatic battery charger circuit. How it Works The idea struck me while trying to design the easiest possible battery charger circuit for one my clients. The concept is simple; just […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Relay, Single

High Current Solar Battery Charger Circuit – 25 Amps

Last Updated on May 17, 2026 by Swagatam 45 Comments

30ampcharger

This circuit is capable of providing as high as 25 Amps of current at any specified voltage between 1.25 V to  30V as per the adjustment of the given pot. The current is constant irrespective of the voltage settings. The circuit can be used for charging batteries in range of 50 to 200 AH. How […]

Filed Under: Battery Charger Circuits Tagged With: Amps, Battery, Charger, Current, High, Solar

Convert SMPS into a Solar Charger

Last Updated on May 17, 2026 by Swagatam 51 Comments

chargingbatteryfromsmpssolarchargercircuit.

In this post I have explained how to convert smps into a solar charger circuit. The method will result in an extremely efficient and fast solar charging of the connected battery. SMPS Solar Chargers SMPSs have become very common nowadays and we find them being used in the form of AC to DC adapters wherever […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Charger, Convert, SMPS, Solar

Battery Health Checker Circuit for Testing Battery Condition and Backup

Last Updated on May 17, 2026 by Swagatam 16 Comments

battery2Bchecker

In this article I have explained a simple battery health checker circuit which uses ordinary components for enabling the user to get an instant reading of the battery efficiency or regarding its effective discharge rate. The idea was requested by Mr. Shrishail. Circuit Objectives and Requirements Nowadays i confirm the battery depicted below. First the […]

Filed Under: Battery Charger Circuits Tagged With: Backup, Battery, Checker, Condition, Health, Testing

5 Simple Power Bank Circuits for Mobile Phones

Last Updated on May 17, 2026 by Swagatam 174 Comments

powerbank

In this article I have explained a 5 assorted power bank circuits using 1.5V cell and 3.7V Li-ion cell which can be built by any individual for their personal emergency cellphone charging functionality. The idea was requested by Mr. Irfan What is a Power Bank Power bank is a battery pack which is used to […]

Filed Under: Battery Charger Circuits Tagged With: Bank, Circuits, Mobile, Phones, Power, Simple

Lipo Battery Balance Charger for Charging of Series Connected Lipo Cells

Last Updated on May 17, 2026 by Swagatam 97 Comments

lipo2Bscan

In this post I have explained a relatively easy lipo battery balance charger circuit which is designed to continuously scan and charge the connected cells of the battery. The idea was requested by Mr. Schindler and Mr. Emil Jan Thomas Baticulon.  Charging 6 Li-Po Packs The concepts are very well written, concise and clear. Thank […]

Filed Under: Battery Charger Circuits Tagged With: Balance, Battery, Charger, Charging, Lipo, Series

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