The CR123(a) battery is a cylinder shaped battery, with a (+) nub cylinder end and a (−) flat opposite end. Although the type CR123 is easily available on the market at specialty stores and internet shops, the characteristics differ per brand. Unfortunately, there are brands that are not well suited for the Mobeye battery-powered alarm and monitoring systems. This has to do with the peak current to be delivered after any use. The effect of using the wrong batteries is mainly that they last much shorter, and that the system is sometimes unable to send a 'low batteries' message. This therefore affects the operation of the Mobeye device to a large extent.