I'm wanting to buy my husband an iPad for him to use on an international trip. He will be visiting Nepal, trekking in the Annapurna region, including going over 3,000 meters for a few of days. The operating conditions state that the iPad shouldn't be used over 3,000m. If he has it in his pack, but doesn't use it at that altitude, will it damage the iPad, or would it be ok so long as he doesn't turn it on up there? Many thanks, Helen