When I bought my I2 at a yard sale it had dead batteries. Before I spend serious money on new or refurbished batteries i wanted to know if it worked. I took it to a Segway dealer (which are few and far between now) and he checked it out and it worked just fine. I picked up a set of batteries and have been riding it ever since. My advise is to find someone with a set of working batteries to test your machines out before buying/refurbishing batteries. I don't know what to do about not having the keys.
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