Kingmax has launched its extended rechargeable battery case series, which the company said is certified for Apple's iPhone 3G and 3GS devices.
The new Kingmax battery extender is a non-slip grip protective case, measuring 12.45x6.60x2.29cm (LxWxH) and weighs 70 grams. The portable battery case includes a 1500mAh lithium-polymer battery, which uses Japan-made battery cells.
With the built-in rechargeable battery, the Kingmax iPhone-use battery case powers the device for up to 270 hours standby. It also has an integrated LED indicator, which shows the charging status.
Kingmax said it has already launched the iPhone-use rechargeable battery case series in Europe, Southeast Asia and Taiwan. It will be available in other parts of the world at a later date.