OK guys, I bit the bullet opened the pack and plugged it in

Tablet recognised it is being charged.

Will report back in an hour or two how much progress has been made

tim

Depends if the tablet's off or on. Even iPads will charge slowly if switched off, even on 1A, but slowly. If it's in use it will still run its battery down unless you have 2.1A or more.
No doubt someone will correct me.