Methods, systems, and devices for techniques for memory cell refresh are described. A memory system may support a low power mode in which the memory system may periodically perform a refresh operation. In some cases, the memory system and a host system coupled with the memory system may support a command to enter the low power mode. As part of the low power mode, the memory system may receive at least one power supply of one or more supported power supplies, such that the memory system may remain active and thus periodically perform the refresh operation. In some cases, the memory system may adjust the periodicity of the refresh operation in response to detecting a triggering event, such as a high temperature, a large system age, or a combination thereof.