michiganjfrog , as the name suggests, cheap chargers and cheap batteries sometimes do not come with a cut-off circuit. And continues to charge the battery even when it is fully charged. Thus causing an over-charge.
A normal USB port can supply a maximum of 500mA, lesser if you use a USB hub. mA (milliAmpere) and mAh (milliAmphere hour) are different, a battery with example 700mAh capacity simply means that it is able to supply full 700mA of current in 1 hour. This does not mean that the USB is unable to charge the full 700mAh capacity.
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Why are clones called MP4 Players, when they don`t play .MP4 at all?
It`s like an MP3 Player which plays Music CDs only.
T39 doesn''t sound as good as my T29
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