Not being able to charge the device using the proprietary charger will render the device useless.
Please don't think "I'll be fine", because you may not be. Safety first!
Please visit 2520 charger - Nokia - UK
Here are some articles about the issue:
Nokia stops sales of Lumia 2520 tablet over electric shock fears - CNET
Nokia issues warning about the Lumia 2520's charger | T3
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