Battery Charger Circuits

Visualize you have a phone battery, but how long does it really last on a charge? This tester circuit is like a battery fitness checker. It tells you how much power your Li-ion battery the kind in phones and laptops can hold helping you see if it is getting tired and needs replacing. This is […]

This is a special charger you can carry with you to charge your phone anywhere, even without a plug. It uses a regular AA or AAA battery just like the ones for your remote control. Inside, it has a part that takes the weak battery power and turns it into strong power for your phone. […]

This Simple NiMH Battery Charger Circuit is like special water can for NiMH batteries which are the same batteries inside camera, toy and other devices. Normal charger maybe not be so good for these batteries but this NiMH charger circuit give just right power and make battery work good and last long time. Circuit Working: […]

This Simple Fast Charger Circuit with Auto Cut Off is fast charger for battery like car battery or backup battery. It charges battery very quick but there is no need worry it wont overcharge. Inside circuit there are have safety part when the battery is full it stops charging by itself. This helps battery stay […]

This circuit shows how to construct an intelligent lead acid automobile battery charger! With this charger users do not have to worry about overcharging the battery because it automatically stops charging it when it is full. This is useful for devices that use automobile batteries such as UPS backup power supplies. Circuit Working: Parts List: […]