building a portable lead-acid charger?
6v 4.5 AH (is AH ampere? or ampere/hour)
max charge current 1.35A
both my batteries are identical
the question now is.. i want to build a charger for it and something to lower is current
so some feature i want is
1) rechargeable by a simple plug in adapter (i have a 12v 4A ac-dc adapter)
2) output of usb voltage and current (optional adjustable current and voltage)
4)optional: a switch to power usb devices directly from the adapter/bypass battery to extend battery life
5)around 5 usb out puts?
i want to build this project cos i have the won batteries which are in good conditions but not being used in anyway..
i hope someone can help me with the technical specs..especially on the circuit diagram
have access to an electrical components shop but it does not sell chips so i need to salvage them