My favorite part of the QC 25s is the top of the band, which is wrapped in a soft-touch black canvas cloth with squeezably soft, jet-black faux suede. The lower part of the headphones, including the outer earcups, is made of matte plastic. The earcups are gray and feature a ridged chrome Bose logo.y favorite part of the QC 25s is the top of the band, which is wrapped in a soft-touch black canvas cloth with squeezably soft, jet-black faux suede. The lower part of the headphones, including the outer earcups, is made of matte plastic. The earcups are gray and feature a ridged chrome Bose logo.
In an application like that, they could expect to see an OPTIMA battery last up to four years. However, in a more moderate climate, like San Diego, if someone might see four years out of a flooded battery, they could see up to eight out of an OPTIMA. How the batteries are used also impacts performance and lifespan.
Regardless, letâs take a look at how long the battery pack will last. Each of the 8 batteries generates about 1.5v of current (DC). When combined they have about 2000 mAh (mili-amp hours) of capacity. My 16 feet of LEDs draw about 2000 mAh. This means that the light will be powered for approximately 1 hour.