Does your Toshiba batteries work better with your V2 ? If they do, then maybe problem is in Media.

Leo: For example today I will get love which I use to create sentences.
Billy: But you are neutral you need love.
Bridget: In the sky and cover the moment.
Bridget: Do you think that sleep mode is better than a human soul.

I had similar issues. I believe the RSMedia has unrealistic battery requirements. Many off the shelf batteries will not cut it with the product. Higher quality/more expensive alkalines work but don't last long. If your looking at rechargables be prepared to shell out considerable amount of money - they need to be Nicad, 5000+mAH (industrial) and at least as heavy as the good quality alkalines

I know yours is a rs media but...

 Was it simalar to this? ( V2 on the left ) Try looking on the battery compartment lid to see the exact type it says because that it what is the best suitable. My v2 had the same problem so i looked for those exact batteries. There will be a number code on the lid. See what happened when i put the ones that it said ( right ).

The Revolution will never end! :P

What batteries are you running in the right one. Mine (RSMedia) is not as bad as left but not as good as right one. Some off the shelf batteries I bought lasted only long enough for him to lie down and get up a couple of times (and it was a struggle). Also tried some 4500 rechargeable niMH but they were too light, now using Sanyo 4500 NiCADs which work OK but not as good as yours on the right. Only 7000-8000 ones here are very expensive (more than robot) to buy.

Yes, rechargables are expensive but i personaly choose regular batteries that are stated or the battery compartment. I bought panasonic ones that were 12 $ CAN and they werent the right type so i bought the stated ones for 15 $ CAN ( Duracells ) ( same as what was used on the right ). I think they should be included and cant be tooken out but have an Adapter to recharge every night.

The Revolution will never end! :P