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I fully charged all 5 batteries. Two of them ...
on September 29, 2014
I fully charged all 5 batteries. Two of them would not spin the props of my Hubsan X4, and the other three lasted for less than 10 seconds each (before the LED's started to blink). The battery that came with the X4 works for about 8 minutes, as does the battery that came with the crash pack (both silver batteries). I also notice the blue tape around these 5 batteries is bulging (as if they are full of gas) - not sure if that is how they are made, or a sign of leakage. The supplier for mine was OKSTATION - they have been notified and I'll post an update as to how they handle the issue.
Update: The person at customer service for OKSTATION got back to me within one day and asked for pictures of the batteries to be sent. After reviewing the pictures, they said that the batteries were overcharged. I've asked for a refund - based on their findings, the batteries that were shipped are not compatible with the Hubsan X4 H107C charger.