Acer 500L - Manual (Page 5)

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15. Warning! Battery may explode if not handled properly. Do not
recharge, disassemble or dispose of in fire. Keep away from
children and dispose of used battery promptly.
16. Use only the proper type of power supply cord set (provided in
your keyboard/manual accessories box) for this unit. It should be
a detachable type: UL listed/CSA certified, type SJT, rated 6A
125V minimum, VDE approved or its equivalent. Maximum
length is 15 feet (4.6 meters).