These custom battery packs feature special brackets or stand-offs to save space inside product packages or can incorporate snap-on plastic cases to create space outside, while maintaining a clean, streamlined appearance. Primary chemistries such as alkaline, nickel-cadmium, nickel-metal-hydride, lithium ion, and LMNO₂ are available. They can be made using standard battery shapes including prismatic, cylindrical, coin, and button cells. Connectors can include flying leads, pressure contacts, and solder or surface mount connectors, and quick-connects.