The two-minute timer on our Oral-B Vitality toothbrushes should reset if the toothbrush has been switched off for 30 seconds. If you switch it off before the 2 minutes are up, and then switch it back on within 30 seconds, it will resume from where you left off.
Check out the capabilities of the Oral-B Vitality Plus Cross Action and Vitality Plus 3D White Electric Toothbrushes.