Hello
How can I make a C/4 charger for my Panasonic Reachargeable Sealed Lead-Acid Battery ( LC-R06R2CH 6V,4.2Ah/20HR ). The battery's data sheet can be found here
Constant Voltage Charge Method is recommended by Panasonic. Thanks.
Also check out the UC3906, made by TI (originally by Unitrode). http://focus.ti.com/docs/prod/folders/print/uc3906.html
The Application Notes for this device provide a lot of information about how to properly maintain lead-acid batteries.