The Hotronics Battery Pack Power Plus S4 is the longest lasting battery pack. With four cells in each battery pack, it is the most powerful as well.
The duration of the Power Plus S4 depends on the setting and ambient temperatures.
Batteries do not have a memory so they do not have to be fully discharged before recharging.
Setting 1 - temperature range is 84-98, lasting 16.5-21 hours
Setting 2 - temperature range is 107-121, lasting 7-10.5 hours.
Setting 3 - temperature range is 122-138, lasting 5-7.5 hours.
Setting 4 - temperature range is 158 -173, lasting 2.5 - 4.5 hours.
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