Desiccant Silica Hygrometer Spool Container Modular - AAA battery remix by vulterey

This is a remix of a brilliant modular desiccant/silica filament spool-size container by @TinkrMakr.

I love the idea of controlling moisture in vacuum-sealed bags with silica gel and hygrometers like (https://www.amazon.com/dp/B07GR67G1M/ref=cm_sw_em_r_mt_dp_vZo7FbC9323KF?_encoding=UTF8&psc=1).

Because they measure temperature and humidity levels every 10 seconds, I found that batteries in those devices run out quite quickly. 

I slightly improved the hygrometer module to fit an AAA battery to overcome this issue. The fact that LR44 has only 115 mAh whereas AAA holds 1100 mAh should improve the battery life of the hygrometer by 9,5 times.

I kept the design of all modules to be interchangeable with the original parts.

If you like the idea and want only the improved battery life of the hygrometer, you can print and exchange only the hygrometer/battery container.

I also added holes in the silica container cone for increased airflow.

You may have to widen the hole for the battery's positive pole. 

I used a sewing pin and a lighter to heat it. 

After that, the connector's pin should jump into the holder easily.

Due to the size of the battery/size of the container, the negative connector part prints only with a groove for the pin (no hole) despite its existence in the design. But I don't have issues with this because of the size of the negative pole of the AAA battery. 

I used breadboard pin connectors/cables. Cut them in halves and solder them to battery connectors inside the hygrometers. The process is fully reversible if you dismantle the hygrometer first and solder wires carefully.

Remember that the negative pole of the LR44 button battery has a negative pole in the centre - whereas other batteries usually have a positive one. 

You may have to cut a bit off the battery holder around the battery compartment to fit the cables and close the battery flap.

See the photos for mounting instructions and details.

To share the good and increase the community creativity, I included the step file if you want to make your modifications.

Print instructions

No supports are needed.

Due to the design of the holes, the stringing may be noticeable. It has no significant impact on the usability of the holder. If you find it too high for your liking, try to lower the temperature of the nozzle by 5-10 degrees Celsius.