Most buyers incorrectly use at open space bathroom or bedroom , fully saturated in 1-2 days.
Visible silica gel beads go from orange , purple grape , greenish , pinkish , transparent.
The internal heater element runs about 3/4 the length , no heat injury to fingers as it feels like full boil egg.
On the first heating recharge session it took 5 hours to fully dry it back to bright orange.
For cool down it took 3 hours in the covered steel pot for cool until room temp.
First problem was this freshly recharged device too strong for the dry cabinet.
Running into the low 30s % RH , had to open the cabinet door a few times per day to exchange humid air in.
Lower isn't better , too low into 20% or less RH can cause adhesive / lubricant / paint coating to detach.
Next recharge sessions I tried heating 2.5 hour and it was sufficient. Cool down times remain fixed at 3 hour.
Cycle between 50% to 40% RH measured at the lowest corner of dry cabinet. The cabinet's built-in digital hygrometer takes reading at top which is 7% lower.
Charging in unwanted steel pot to insulate the heat

green to bright orange after 5 hours

cool down horizontally in the pot for 3 hours , put a pot lid to stop air exchange

The heating session consume about 22 watt for most of the duration and gradually lower to 18 watt at 5 hour.
No auto-cutoff function.
Electronic dry cabinet runs at 3 watt normally to hit 45% RH and 0.5 watt when lowest setting to only run the hygrometer display.

At this scenario I tried to simulate a storage tub holding a 6 inch SCT OTA (17.5cm diameter) , used a dummy 20cm diameter cylinder.
My green plastic tub's internal size cannot fit 8" SCT. With 6" SCT there may be 2 to 4cm leftover in Length.
Tub's edges are terrible with open gaps on the top lid as it wasn't designed to be airtight seal.
After 2 run ending at approximately 10-11 days each, I received a bigger airtight tub with silicone o-ring seal to test 3rd time.
Conclusion : normal tub lid unsuitable with air gap leak , viable low cost drybox or plastic bag solution if airtight.
green tub with gap at lid edges

airtight tub , listed as 80L with 63.5cm external , I measured 53cm internal length.


28% RH climb to 51% over 65 days

Did another test on a cracked tub that I repaired , brand new fresh dehumidifier + 5 hours heat recharge
It drop to less than 10% RH overnight. Verified with digital and analog hygrometer , drop 65 to 25% rh within first 3 hours.
This is too dry and potentially cause damage.
