Hello all, I recently bought a new Bosch drill that comes with an 18V 3,0Ah Li-Ion Battery, which is all well and good, but there is a meter on the back of it with an On button that seems to do nothing at all. I've attached a picture of the meter. Can anyone tell me how to get this to work? There is no mention in the manual or anywhere online (that I could find at any rate). Thanks a million for your help. Michael.