In my lm3886 amp I have two 10,000uF 35v caps for power filtering, and I know my 14w practice amp has two 2,200uF caps. So how do I know how large the caps should be? I'm working on building a SLA charger that will have a 300ma transformer and charge at 13.5vDC, someone said I don't need power filter caps. If thats the case, would I just go transformer, rectifier, lm317 regulator -> battery?