0rickharrisBest Answer 5 years ago ReplyUpvote1. It is an electrolytic capacitor and is polarised - That is it has a + and a - connection Make sure you get them the right way round. 2. Correctly applied any DC supply will charge the capacitor - up to a MAX of 200 volts although I wouldn't go even close to that. 3. At 47 micro farads (0.000047 farads) you won't find it holds a huge charge. 4. The charge time will be the capacitance x the resistance in the circuit - it will be considered fully charged after about 60% of the C x R time. Charging it isn't really an very interesting occupation.