If there is, then the capacitor should be replaced. If you’re replacing capacitors with higher values than the originals, then it’s important to check for other components that may be affected by the change. This is especially true when it comes to voltage and current ratings.
As the capacitor charges up, the current gradually decreases until it reaches zero. Once the capacitor is fully charged, it stops accepting current, and the voltage across the capacitor remains constant. If the voltage across the capacitor is changed, the capacitor will either charge or discharge until it reaches the new voltage.
However, as the flowing current charges the capacitor, the voltage on the capacitor increases. This voltage opposes the flow of more charge and the current begins to decrease. The rate at which the capacitor charges slows as the current decreases -- as more and more charge builds up the current becomes smaller and smaller.
When a capacitor is discharged, the current will be highest at the start. This will gradually decrease until reaching 0, when the current reaches zero, the capacitor is fully discharged as there is no charge stored across it. The rate of decrease of the potential difference and the charge will again be proportional to the value of the current.
Here are some fundamental rules for replacing electrolytic capacitors in circuit boards. Replace with exact type if available. Replace with capacitor that has the same capacitance (uF – microfarad) as the original. Replace with capacitor that has the same voltage rating or higher. Use higher temperature capacitors when possible (105c).
The rate at which the capacitor charges slows as the current decreases -- as more and more charge builds up the current becomes smaller and smaller. The current decreases exponentially -- it asymptotically approaches zero for longer and longer times.