Penicillins are a certain collection of antibiotics that eliminate infection causing bacteria. Also known in short as pen or PCN, they originate from a type of fungi called Penicillium fungi. They are used in the treatment or prevention of many different bacterial infections, usually caused by Gram-positive organisms.
VRLA battery. (Redirected from SLA battery) A VRLA battery stands for (valve-regulated lead-acid battery) more commonly known as a sealed lead-acid (SLA), gel cell, or maintenance free battery, is a type of lead-acid rechargeable battery.
Batteries play a significant role in powering an RDA/RBA. The most common batteries used are 18XXX series batteries. There are 18350, 18490, 18500 and the most often used, 18650. The 18 refers to the battery width (18mm), and the length is determined by the second two numbers (35mm, 49mm, 50mm and 65mm).