Panasonic eneloop Pro 4 x 2550 mAh batteries AA size

SKU
118381
product overview
product overview
  • Provides high power performance down to sub-zero temperatures (as low as -20°C).

  • Can be recharged up to 500 times.

  • Factory pre-charged by solar energy and ready to use right out of the package.

  • Maintain 85% of their charge after 1 year of storage.

  • No memory effect – batteries can be recharged when fully, or partially drained.

$22.50
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eneloop Pro - For Professional Use

The eneloop Pro batteries are the perfect choice for powering high current consuming devices such as photo strobe flash lights, wireless keyboards, mice, game controllers, radio controlled toys and a range of household devices.
They can all realize extended performance when powered by eneloop pro batteries.

We have developed the eneloop pro batteries to excel in extreme conditions where high power performance in very low temperature environments (down to -20°C) is needed.
The eneloop pro Nickel Metal Hydride batteries retain up to 85% of their capacity even after one year of storage.

Unlike regular alkaline batteries which can only be used once and are wasteful to the environment, the eneloop pro batteries can be recharged up to 500 times.
They come pre-charged and can be used immediately out of the pack.

Panasonic eneloop pro unique features at a glance

  • Low self discharge rechargeable  battery.

  • Size AA: Minimum capacity 2450 mAh.

  • Provides high power performance down to sub-zero temperatures (as low as -20°C).

  • Can be recharged up to 500 times.

  • Combines the best features of AA alkaline (ready for use) and rechargeable (reusable) batteries.

  • Factory pre-charged by solar energy and ready to use right out of the package.

  • Maintain 85% of their charge after 1 year of storage.

  • Stable voltage with longer power life than alkaline batteries.

  • No memory effect – batteries can be recharged when fully, or partially drained.

  • Provide long lasting power while saving costs.


Specifications

Element type: AA
Alternative name: LR06 / HR6 / M / 15A / Mignon / Penlight / MN1500 / MX1500 / 316
Chemistry: NiMH
Voltage: 1.2 V
Capacity: 2550 mAh
Height: 50.5 mm
Diameter: 14.5 mm
Weight: 29 g
Package contents: 4 × eneloop BK-3HCCE NiMH rechargeable batteries


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.

Basic construction of a 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.

Self-discharge in Ni-MH batteries
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 self discharge of Ni-MH batteries is caused by three main reasons:

  • The chemical decomposition of the cathode

  • The natural disaggregation of the anode

  • Impurities of the anode

How could the self-discharge be reduced?
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.


(1) Advanced materials:
Development of a highly-durable super-lattice alloy 
The durability of Panasonic’s original super-lattice alloy, a negative-electrode material used in eneloop, has been enhanced by homogenizing the crystalline structure (a reduction of crystals with an irregular atomic order is irregular) as well as improving its composition (the ratio of constituent element) to reduce the deterioration of the super-lattice alloy by repeated charge and discharge

(2) Advanced manufacturing method:
Developed technology to protect the surface of the super-lattice alloy 
A new additive to the negative electrode material, super-lattice alloy, and a new additive coating technology was developed. By protecting the alloy surface, deterioration of the super-lattice alloy by repeated use can be reduced.

(3) Advanced structure: Use of strong/thin outer case
The new eneloop adopts the same strong/thin outer case used for Panasonic’s industry-leading level high-capacity AA-size rechargeable batteries, the Ni-MH2700 Series. This improves the internal cell space efficiency and optimizes the balance of battery components, leading to an increase in the number of times a battery can be recharged.

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BrandPanasonic
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Panasonic eneloop Pro 4 x 2550 mAh batteries AA size

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