I already updated the firmware. Nothing was wrong with it.. The 5th led just takes too long to charge.. The first 4 leds take about 20 min each, but the third one takes around 2-3 hours. I thought it has defect because I used it for like 2 hours and it still had 5 leds on. When I charged it suddenly had just 3. But now it work fine. Thanks for the answer though. :)
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