Probably the same reason that wireless became radio; unless its a bit of computer add-on that is.

The reference works suggest the usage of accumulator for a large, rechargeable electric cell is peculiarly British.

Similarly you don't hear much about charabancs these days either although we seem to have plenty of busses.

If you think Lucas is bad, try Miller electrics. . . . . . . . . . . .

R.