Clarifications about charging a 9V battery?
Since the Battery is Chinese then its description has no details. Does its "protection circuit" limit the charging current to prevent an explosion? Maybe not then kaboom! The person who wrote about this battery showed that he used a fairly complicated circuit to charge it with only 55mA and it limited the voltage accurately.
DealExtreme says this battery cannot be shipped to many countries because it is very dangerous (and cheap).
Why do you think it can be charged with only 5V? It says it is disconnected when the voltage is less than 6.1V.