Specialty battery accessories are specialized or proprietary products and accessories related to batteries. There are several types of specialty battery accessories. Examples of include battery chargers, battery packs, battery power adapters, solar battery chargers, battery holders, battery cabinets, battery racks and battery testers. A battery charger is used to recharge discharged batteries. Many batteries of the same capacity are assembled to form a battery pack. A battery power adapter enables operation of a device and charges a battery from electrical power outlets. A solar battery charger employs solar PV charge controllers that takes uncertain voltage from a solar panel and condition it to safely charge lead acid batteries. A battery holder is designed to support commercial, industrial or OEM batteries. Types of battery holders include plastic, metal, battery snaps, coin cell, component clips, battery racks, and battery cabinets. A battery tester can be used to indicate a particular state or condition of a battery. Other specialty battery accessories are commonly available.