On 2008-06-07 22:24:14 +0100, "The Medway Handyman"
said:

Getting to the point where an inverter starts to make more & more sense.
Phone charger, drill chargers, light bar charger etc.

Looking at these http://www.tlc-direct.co.uk/Products/TLINV300.html

It mentions in the spec "These inverters generate a modified sine wave,
which although not perfect, is considerably superior to the square waves
which are produced by most other inverters".

Is that a good thing?

It also mentions Peak power - 1000w Does that mean it would run an 800w
angle grinder for long enough to cut off a padlock or wheel clamp?

Yes, but then there would not be enough energy left in the battery to
turn over the engine.