According to duracell the prime environment for batteries is somewhere dry and room temperature.
Are attic usually dry.
Few attics are heated or cooled so they re extra hot in the summer and frigid in the winter.
At high temperatures like the ones you might find in your attic batteries can rapidly lose power or may even start leaking potentially setting you up for a chemical burn.
Inadequate ventilation attics must be vented to allow moist warm air to escape.
The warm moist air inside the vent tends to condense on the colder walls.
Plus being up high with plenty of airflow can make the space inside a fairly dry environment such temperature fluctuations and aridness mean you should keep things like upholstered furniture delicate fabrics electronics and candles out of attics.
An attachment with a 3 4 in 1 9 cm opening should work well.
Air conditioner condensate pan not draining.
Top causes of attic moisture.
Clothes dryers venting air to the attic rather than outside.
To clear out your clog you can use a standard wet dry vac with a 10 12 us gal 38 45 l tank.
Though attics are typically hot and dry a leaky roof or pipe condensation or severe weather can cause water to enter your attic.
Buy or rent a wet dry vac with attachments if you don t have one.