From Amazon:
Panasonic Rechargeable Eneloop AA Batteries are the perfect choice for powering high current consuming devices such as photo flash, wireless keyboards and mouse, game controllers, radio controlled toys and a range of household devices. Combining the performance and convenience of the dry cells with the cost- efficiency of rechargeable batteries. Eneloop is the best choice for you and the environment. Can be used right after purchase and can be stored for a long period of time. Long-lasting storage the electric charge up to 1 year with 85 percent energy remaining. 500 Time electric rechargeable. Ideal for digital camera, voice recorder and the general electronic devices. More often rechargeable making more saving energy and environmentally friendly. Comes in pack of 4. Batteries come pre-charged using solar power and are ready to use straight out of the packet.
The IKEA Ladda 2450mAh are $12/4 pack. Are they not meant to be the same battery?