MAKUHARI, Japan--If you forget to charge your phone overnight, NTT DoCoMo has a prototype case that can do the job.

The prototype super-fast rechargeable battery case, being shown off here at Ceatec 2011 takes only 10 minutes for a full charge. When your phone battery dies, just slip it into the case for a recharge.

You still have to charge your phone at the regular speed, of course, but you have a portable source of power that's fully juiced in minutes.

That could be handy if you're not near a power source.

The case uses a lithium-titanate (LTO) battery that's much faster on a recharge than lithium ion.

It's similar to Toshiba's Super Charge Ion Battery, which can recharge in 5 minutes and lasts for 6,000 charge-discharge cycles.

DoCoMo hasn't said when the battery case could hit the market, or a possible price.

Source: Cnet

DoCoMo battery phone case Pictures

Also on Blogsteady