Test/Review of Duracell AAA Duralock 750mAh (Green-Copper)

[size=+3]Duracell AAA Duralock 750mAh (Green-Copper)[/size]



Official specifications:

• Battery Technology: Nickel Metal Hydride (NiMH) (Rechargeable)
• Battery Capacity: 750mAh
• Diameter: 10.5mm
• Height: 44.5mm
• Voltage: 1.20V
• Weight: 11.0g
• Can maintain 80% of charge for 6 months.
• Can maintain charge for 5 years.

Maximum temperature raise at different discharge currents: 1A:+2,1°C, 2A:+4,7°C, 3A:+7,1°C, 5A:+11,2°C

This is Duracells rechargeable AAA cells.


I got the batteries together with a charger.









The discharge curves looks fairly normal (With NiMH tracking is not as important as with LiIon).















[size=+3]Conclusion[/size]

Performance looks good, but I wonder about the very loose LSD (Low self discharge) specifications.



[size=+3]Notes and links[/size]

How is the test done and how to read the charts
Compare to other AA/AAA batteries: Alkaline/NiMH/Lithium

Excellent test review as always. Thanks a lot for your effort and time. HKJ! :thumbsup:

Comparing to Eneloop AAA (750mAh),
- Can maintain 80% of charge for 6 months (Duracell) : Low self discharge type, 70% capacity after 5 years (Eneloop)
- Can maintain charge for 5 years (Duracell) : 1800 charge/discharge cycles (Eneloop)

As you mentioned, their spec. seems not so excellent.

You said "With NiMH tracking is not as important as with LiIon". Could you explain the reason?

candle lamp said:

You said "With NiMH tracking is not as important as with LiIon". Could you explain the reason?

Click to expand...

There are two factors with the tracking:

When producing cells there will be small variations between them, usual a manufacturer will do some grading, where they sort according to the capacity. This secures that all cells in a batch has the same capacity and means you will get maximal capacity when using them. I.e. with high production quality you expect the cells to have the same capacity.

When discharging a difference in capacity means some cells will be discharge before other cell, with NiMH this is not really a big deal, but with LiIon you risk over discharge for the cells with low capacity and that is a problem.

Thank you again for your detailed explanation. I learn much by your excellent reviews.

Right on HKJ, thank you for this, worthy +10.
These are a local hit IMO.
I love instant gratification.