Sanyo New Versio n XX 2500mAh AA Low Self Discharge Batteries x 8 with battery holder
Batteries have a property to release the stored energy in small amounts (this phenomenon is called self-discharge). This property is particularly noticeable in rechargeable batteries such as Nickel Metal Hydride Batteries etc. as compared to dry cell batteries, hence disabling rechargeable batteries from becoming batteries that customers can use immediately after purchase. For this reason, rechargeable batteries couldnt be used unless charged after purchase and so lagged behind dry cells in convenience. This new products main property is that it has introduced great improvements in self-discharge properties (residual ratio after one year of non use is 75%, in temperature conditions of 20 degree Celsius according to SANYO research). Through this breakthrough development, SANYO has realized a rechargeable battery that can challenge dry cell batteries in user-friendliness through features such as making possible use immediately after purchase or once charged, its ability to be used anytime. How was the self-discharge reduced? Modern Ni-MH batteries consist of two metal stripes ( anode and cathode ), which are separated by a non-conductive porous plastic foil ( separator ). These three stripes are laid on top of each other and are winded to a coil. This coil is put in a metal can and immersed with a liquid ( electrolyte ). Then the metal can is closed with a cap.