I wouldn't call this battery behaviour OK. First of all it's pretty stupid design to rely on the battery for the system to function at all. Second, there is no reason why the battery shouldn't last equal time as with PC.
I would call it either bad design or manufacturing error.
AmigaOnes have had some components in wrong orientation/missing before.
The first measure we are announcing is that we have pledged ourselves to the production and development of a platform where both users and developers are guaranteed not just a quality product but a total quality experience as well. This will be achieved through a combination of a strict set of Quality Assurance certifications and the AmigaOS only being available to licensed solution providers for the shipping of combined hardware and software solutions.
From the top of the company to the bottom, we are committed to championing the cause of quality for the consumer and will ensure that substandard products do not make it into the Amiga market where they can do irreparable damage to the reputation of the platform. Licencees will have to develop and resource a full customer solution, with guarantees on product quality, delivery, and most important of all post sales support, with firm commitments to repair, replacement and turnaround, elements that have blighted the platform over the last five years.
That much for the "quality control".