What is the capacity of 3500v volts?
CREATE TABLE "electrostatic_electrolytic_and_electroch" (
  "capacity" text,
  "volts" text,
  "temp" text,
  "energy_to_weight_ratio" text,
  "power_to_weight_ratio" text
);
SELECT "capacity" FROM "electrostatic_electrolytic_and_electroch" WHERE "volts"='3500v';