Maxwell 3000 farad 2.7VDC Boostcap(R) is one of the most powerful capacitors available. These are about 5.25" long x 2.4" diameter (excluding the heavy duty M12 x 1.75 threaded 0.6" long studs on each end). They are used in electric cars, trains, solar and other applications requiring enormous instantaneous power. This particular capacitor has a maximum power rating of 3020 watts and a maximum stored energy of 10944 joules (3.043WH). Leakage current is 5.2mA. Weight is about 1.1lbs. In electric automotive use they can recover much of a cars energy when braking that would normally be lost to heat. These are used (good condition) and were removed from huge assemblies. Each capacitor comes with two 12mm nuts for the studs. See video links on these amazing capacitors! Hurry... Limited Quantity, While Supplies Last. Huge Discount! They Sell for $95.00 New!