Using the MAX712 can be designed a charger for Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) batteries .
This charger based on MAX712 chip require few external components and is easy to build .
Using the LT3650 monolithic single-cell Li-Ion Polymer battery charger can be designed a simple charger using few electronic parts .
The LT3650 provides a constant-current constant-voltage charge characteristic and maximum charge current externally programmable up to 2A
For this simple lead acid battery charger we need a center tapped transformer (12V 0V 12V) which need to give a 5 amperes current ,two diodes and one capacitor.
We use 1n4007 diodes to make the dc from ac.