Panasonic Eneloop AA - 2 pk

The Panasonic eneloop 2000 mAh batteries AA Ni-MH "Low Self Discharge" batteries utilize Panasonic's advanced rechargeable battery technology allowing them to be recharged up to 2100 times

eneloop battery cells deliver consistent power performance, maintain 70% of their charge for up to 5 years, come pre-charged by solar power (at the factory) and are ready to use out of the package. These eneloop cells also have increased storage life and extreme temperature performance down to -20°C

Key Features of the Panasonic eneloop  2 x 2000 mAh batteries AA size

• 2000mAh typical / 1900mAh minimum (AA)
• Hold up to 70% of their charge after 5 years of non-use.
• Can be recharged up to 2100 times
• Pre-charged at the factory using power generated from solar energy and ready to use right out of the package.
• Work in extreme temperatures down to -20° C.
• Batteries can be recharged when fully, or partially drained.
• Ni-MH, Low Self Discharge rechargeable batteries.

This eneloop is a Ni-MH battery. To understand the modifications done to the eneloop batteries, it helps to understand the construction of a typical Ni-MH battery

Ni-MH batteries, like most other rechargeable batteries, consist of two metal stripes - the positive and negative electrode. Between these metal stripes an insulating foil, the separator, is placed. This sandwich of three layers is rolled-up to a coil and placed into a metal can, which acts as negative pole of the battery.

Before closing the can with a cap, a liquid, the electrolyte, is filled into the can. The cap contains a gas release vent, which allows to release hydrogen, when the battery is overcharged. The electrical behaviour of the battery depends on the composition of the electrodes, on the separator and on the used electrolyte.

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 wound 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.

The chemical decomposition of the cathode has been reduced substantially by the use of a new superlattice alloy. As an additional benefit the superlattice alloy increases the electrical capacity of the battery and reduces the internal resistance, which allows higher discharge currents. Another advantage of the super-lattice alloy is that less cobalt is needed to stabilize the compounds' structure.

The anode has been strengthened by another new material, which reduces the natural disaggregation. Additionally the separator and the used electrolyte have been optimised for low self discharge of the eneloop.

Which changes have been made for the new eneloop?

The technological difference between the "old" and the "new" eneloop is, that the super-lattice-alloy of the "new" eneloop has been even more improved.

• MPN - BK-3MCCE/2BA
• GTIN - 8887549556173