One would have thought anyone buying a HTC Touch Diamond would have bought it for the style, but the allure of TouchFlo3D may have caused people who should have known better to buy the 900 mAh Windows Mobile smartphone against their better judgment.
For those people, who have no compunction in turning their style icon into a horrible monstrosity, Yooboa has the solution. The Chinese company is offering a 1800 mAh battery with a custom battery cover that will put the humpback of Notredame to shame. Despite appearance however, it only brings the depth of the device to 17mm, which is still much thinner than your Mongul.
The battery is a steal at around $25 and the company is accepting orders via Paypal. If you really prefer function over style (why did you buy a Diamond them?) read more about the battery here.