Hi All. I'm running a 555 on my circuit. On my scope I see the signal over the cap rise to 120V (4.7 micro-farad). The voltage over the battery (4Ah) during charge rises to 16V.

question: when you people report about the voltage over the cap, do you use an oscilloscope or DVM (or analog meter)? And if DVM, (digital volt meter), is it true rms?

I'm confused now, because Aaron saying that it is good just to charge 2V over the battery voltage...