Apple wireless keyboard, no battery logo always blinking

Hello,
I just got my battery changed for my apple wireless keyboard. Even if i replace the battery again, the issue start again.
The not battery logo is always blinking every 5 seconds which is terribly disturbing.
What could be the issue about it ?
Thx for your reply.
PS : i use windows 7

I don't know about the Wireless Keyboard, but Apple's Magic Trackpad (MT) is amazingly inaccurate in telling the computer how much power is left. I have a mid 2010 iMac (27", 3.6 GHz i5, 10.10.1). About a week ago, my the iMac reported that the MT had a low battery. Usually, I tend to change the battery when this happens. This time, I decided to just keep on going. Well, it's been more than a week now, and the MT is working fine. The battery charge has been gradually dropping (sort of), and now reads 8%. One day it even went to 40%, but then it dropped back to 9. I don't think this has anything to do with Yosemite, since I had been noticing that the battery life on my MT seemed awfully short, lasting less than 2 weeks on Apple's rechargeable batteries. This has been the case from 10.6 through 10.10.

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http://support.apple.com/kb/ht1809
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Apple wireless keyboard, no battery logo always blinking

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