Once new battery arrived,
cut the three solded wires
of the old battery one by one (White, Black, Red).
Remove the old battery gently, not to disform the battery pack.
Place the new battery in the middle of the battery space (blue rectangle in picture above) - or you will have difficulties to close the device after.
Plug in the connector of new battery to the socket.
IMPORTANT: There ist just ONE direction to plug it in correctly (like USB Sticks). Dont use force.
(Or take a magnifying glass to check plug an socket for the correct direction before trying.)
That's it
.
Put everything togehter. Close the Backcover. Turn on you device - new battery had 75% charge left. Everything should working. Turn it off an charge the new battery to 100% - until the charge light goes off.
And have fun reading your books on the device about a week long, whithout new charging. And all the other functions of your eReader are working properly again.
Hope that helps someone. Have fun.
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