Two packs of my new EnerG cells did this last week. They were delivered with charge in every cell and so i equalised. When i charged i noticed that the cells were reading about 7.5 volts. I equalised and recharged them and and they charged normally and every cell now is working! I have cycled them 2 or 3 times and they are working fine.
So my advice would be to equalise and charge them again and see.
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