Hi there fancyfont, thank you very much for the welcome and your advice
I placed the battery back into charger, after 10 or so minutes the green Pleo light came on. I installed the battery, he's functioning for about 2 minutes, then it's back to the odd pattern. I have the battery back in the charger now.
Should I just keep the batter in the charging station for a few hours? is there still charging taking place when the green light is on?
I'm quite worried because he is a gift to my nephew for Christmas. I bought him off ebay, he is brand new, the box was still sealed.
Shall keep you posted, thank you