This battery concept is designed by three designers – Pyeong Joo Goh, Jong Seung Choi and Ji Soo Hong. It is called the AtoD Rechargeable Battery, an one size fits all slots. Meaning that you can change the size from A to D. The battery is made from memory form, it squishes to the required size in a squeeze. It provides you 1.5 Volts of Nickel Hydroxide power, rechargeable. More pictures after the break.

[via Yanko Design]