Leaving the rechargeable lamp plugged in depends on the battery it uses, although it is typically not advised. Older battery models can have a shorter lifespan if left plugged in at all times. Newer batteries mostly avoid this issue, although it is generally a good idea to unplug the lamp at full charge and use it until the battery is completely drained before recharging. Recharging during partial capacity can sometimes create “memory” within the battery, shortening the lifespan.