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.
Are attic usually dry.
According to duracell the prime environment for batteries is somewhere dry and room temperature.
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.
Top causes of attic moisture.
Buy or rent a wet dry vac with attachments if you don t have one.
Inadequate ventilation attics must be vented to allow moist warm air to escape.
Make sure you also have an attachment that will connect the wet dry vac to the drain line.
Few attics are heated or cooled so they re extra hot in the summer and frigid in the winter.
An attachment with a 3 4 in 1 9 cm opening should work well.
Air conditioner condensate pan not draining.
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.
Clothes dryers venting air to the attic rather than outside.