Below is a list of the all the computers in the Retro-Kit collection that have batteries fitted describing the type of battery and the dates when they should be changed. It's intended as a centralised memo for the collection to track the battery changes.
Early Acorn computers used a battery backed CMOS to store default configuration settings and power a real time clock to maintain the time. In the early machines, the batteries were typically non-rechargeable 'AA' types although the Acorn Master could support rechargeable batteries too. With the advent of the BBC A3000, Acorn began fitting rechargeable batteries to the motherboards of their computers which if left unchec