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Thanks.
The weight is 14v/2.3k, 18v/2.5k, 24v/2.95k.
The rating is 1.7A/h, N-cd. Everything you said to steer clear of, Clanad!!. The spec does list batteries with higher ratings, up to 2.0A/h, but these are obviously not used in the UK version of the tool.
It looked like a bargain but now Im not so sure. As you said, Scotman, quantity is not a gurantee of quality, although it does look and feel a mean piece of kit.
I will have to do some more research, now that I know what to look for.