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Old January 17th, 2013 (4:59 PM). Edited January 17th, 2013 by SaniOKh.
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SaniOKh SaniOKh is offline
The Cynical Completionist
Join Date: Jun 2006
Location: France
Age: 28
Gender: Male
Nature: Lonely
Posts: 525
Unless you can trade it to another game before replacing the battery, sadly yes :/ .

I've heard some people managed to keep their save files by replacing the battery while the game was in a powered up Gameboy, but if it's your first time changing the battery, it won't be as easy, because the original battery is soldered in four tiny spots. I used a cutter to extract the batteries from my GB/GBC carts, and Crystal's battery was the hardest to extract. Plus, you know, electricity can be dangerous.

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