My IMP1000 came in a few days ago. I tested it briefly on my A70 and A101: just to see if the charge icons would come on. They did. The output of the IMP1000 is 5V, 1A. I'll be testing over the next few weeks and report back.
I chose the IMP1000 balancing weight, volume, capacity, and price - time will tell if it was a good choice.
I understand. I'm sure you'll love your IMP-1000! We have two IMP-500 in the family and love them both.
At first I was using an IMP-880 and exchanged it out for an IMP-500. The reason was that the IMP-880 firmware doesn't work with the HTC EVO. It would turn itself off before the HTC EVO was completely charged. The guys at NewTrent agreed it was a software error in the device and would fix it, in the meantime they exchanged it for an IMP-500 and the price difference.
The IMP-1000 sounds nice. I might want one to say charge the devices I carry (e.g. HTC EVO, PSP-3000, and A70) when out of the house.
The IMP-500 is 5V 600mAh. I wonder what amp rating the A70 8GB and A70 250GB require.