Apple’s just-released MagSafe Battery Pack faced plenty of mockery for not being about as slim as a credit card, as some people apparently expected. This criticism clearly comes from people ignoring an inescapable fact: Batteries are always bulky.
Until there’s a revolutionary breakthrough in power storage tech, there’s no way to make an ultra-slim battery store a useful amount of power. Stop expecting it. And stop criticizing companies for not miraculously producing an impossible product.