My ASUS Transformer Book T100 takes forever to charge

Hi

I recently brought a second hand ASUS Transformer Book T100

the person i brought it off didn't have the original charger, I've tried 2 so far and it takes FOREVER to charge, its been on charge for almost 24 hours now and I'm at 58%

do these tablets have a special charger ?

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How are you charging it? the original charger for your Transformer should be a 5V 10W charger

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