Instruct: Classify the given Amazon review as either positive or negative.
Query: On-Off Design Challenges

I received my MFUEL Universal Power Bank 9200 mAh Li-Ion Battery Pack with great anticipation for use on around the world airplane flights -and although the product does provide the additional juice as advertised, it has some real design challenges - the unit I received will turn on with any pressure to the top of the battery pack (without even hitting the on-off button), which means it will turn on while in a briefcase and begin to drain precious battery life. The design is flawed -- one must hold down the on-off switch for a few seconds to turn off the unit, but it takes no effort at all to turn on the switch - it definately needs a better on-off switch.Also, after just one use, the small rubber pads on the bottom of the battery came off.Also, the unit I received has a label that indicates that it was made in CHENA --- I am not sure where CHENA is located, but the label may be indicative of the quality of this product.