Today I received an e-mail from Sony which included the following paragraph about the replacement battery for the NW-HD5 / NW-HD5H. "Keep listening for longer with the LIP880 rechargeable and removable battery, which offers 40 hours of STAMINA battery life. Whats more, the LIP880 is easy to recharge with built-in USB and AC jack points. And because these lithium ion batteries are interchangeable you can double or even triple your battery life." Surely that does not mean the battery has its own charging ports as it implies? Can anyone confirm this one way or the other? Remember we are not talking about the original battery but the off the shelf replacement one.