There may be different levels of "cheap". I bought a €20 digital caliper (this one[1]) and the battery is still fine, 2½ years later. [1] https://www.bauhaus.

There may be different levels of "cheap". I bought a €20 digital caliper (this one[1]) and the battery is still fine, 2½ years later. [1] https://www.bauhaus.dk/alpha-tools-digital-skydelaerer https://www.bauhaus.dk/alpha-tools-digital-skydelaerer