Theoretical maximum deep sleep duration can be found with [`node.dsleepMax()`](#nodedsleepmax)
Theoretical maximum deep sleep duration can be found with [`node.dsleepMax()`](#nodedsleepmax). ["Max deep sleep for ESP8266"](https://thingpulse.com/max-deep-sleep-for-esp8266/) claims the realistic maximum be around 3.5h.
!!! caution
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@@ -135,13 +135,12 @@ Returns the current theoretical maximum deep sleep duration.
!!! caution
While it is possible to specify a longer sleep time than the theoretical maximum sleep duration, it is not recommended to exceed this maximum.
While it is possible to specify a longer sleep time than the theoretical maximum sleep duration, it is not recommended to exceed this maximum. In tests documented at ["Max deep sleep for ESP8266"](https://thingpulse.com/max-deep-sleep-for-esp8266/) the device never woke up again if the specified sleep time was beyond `dsleepMax()`.
!!! note
This theoretical maximum is dependent on ambient temperature.