ASUS Transformer Pad Infinity (TF700T) Review

Battery Life

The Transformer Pad Infinity features an integrated 25Wh battery, similar to the original Prime. You can obviously extend battery life by docking the Infinity into the optional keyboard dock.

Without an increase in battery capacity, you can expect a drop in battery life compared to the Transformer Prime as there's a leakier SoC, faster DRAM, higher resolution panel and brighter backlight to drive. The drop isn't huge, but it's noticeable:

While the original Prime pulled just under 9.5 hours, the Infinity borders on 8 hours of continuous use on a single charge. It's very similar to the battery life from the original Eee Pad Transformer, and better than what you can get out of a TF Pad 300. Eight hours isn't bad by any means, but it's the price you pay for maintaining portability while driving up performance/display.

Video playback battery life is thankfully quite respectable on the Infinity. I haven't had time to run the Prime and TF Pad 300 through our new tablet video playback test but at over 10.25 hours there's really nothing to complain about here. You can watch a few movies on a single charge, which is great for anyone stuck on a long haul flight.

For our gaming battery life test I'm not sure just how comparable the iOS/Android numbers are because it's quite likely that the NVIDIA hardware is actually doing more work here. But the important takeaway is the significant drop in battery life compared to the TF Prime. What we're likely seeing here is the penalty of the leakier SoC combined with the higher speed memory and increased memory bandwidth demands. If you're gaming on the Infinity, just plan on having a charger handy.