Just 4 of these rechargeable batteries can replace up to a staggering 1200 disposable batteries. While they may have a higher up front cost they are far more cost effective in the long run. Not only are they more cost effective but they are also very environmentally friendly, reducing a lot of waste.
With a low self discharge rate, they will retain up to 80% of their power for a year after charging. They also come pre-charged, which means you can use these ReCyko+ 650mAh AAA batteries straight out of the packet.