ELi5:why do memories(SRAM/DRAM) need continuous refreshing to store a bit of information?

Question

ELi5:why do memories(SRAM/DRAM) need continuous refreshing to store a bit of information?

In: Engineering

Answer 1

I believe only DRAM (the more common type) needs to be refreshed. DRAM uses a capacitor to store information because it’s smaller and cheaper. However, a capacitor is inherently temporary and will drain over time. Because the capacitor drains, the bit will eventually be lost. So the capacitor needs to be recharged every so often to prevent it from draining.
Edit: fixed mistake.