Updated 29 Apr 2016

Panasonic

Evolta

Bottom line: The Panasonic Evolta (Alkaline) has OK overall performance. But its high-drain energy is just OK.

Evolta
Consumer score
67
Price guide

$2.50

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Test results

Overall score
OK
67
Overall value
Good
7.2/10
Performance (low-drain)
Very good
8.1/10
Performance (high-drain)
Just OK
5.3/10
Value (low-drain)
Good
7.4/10
Value (high-drain)
Good
7.0/10

Good points

  • Very good low-drain endurance.
  • Good low-drain energy.
  • Good low-drain value for money.
  • OK high-drain endurance.
  • OK high-drain value for money.

But

  • Just OK high-drain energy.

Additional scores

  • Endurance (low-drain) (/10): 8.4
  • Endurance (high-drain) (/10): 5.8
  • Energy (low-drain) (/10): 7.8
  • Energy (high-drain) (/10): 4.9

How we test

Each AA battery goes through high- and low-drain tests to assess how they perform in different gadgets – we averaged the results from four examples of each model in every test. We measure how long they last in each test and the amount of energy they deliver over that time, then convert these measurements into a performance score. The low-drain test uses a load of 24 Ohms, while the high-drain test uses a 2 Ohm-load.

Our performance scores are weighted evenly between performance and run time from each battery’s starting voltage of 1.5V down to 1.0V then to 0.7V – some devices start to falter and won’t operate at 1.0V; we use 0.7V as our benchmark for completely empty. We also calculate a ‘Value’ score based on how much each hour of use costs.

Key data

Product

Price guide
$2.50

Specifications

Size
AA
Type
Alkaline
Cost per hour (low-drain)
0.04
Cost per hour (high-drain)
0.80
Capacity (mAh) (low-drain)
2949
Capacity (mAh) (high-drain)
1805
Time to empty (low-drain) (hrs:mins)
59:60
Time to empty (high-drain) (hrs:mins)
3:80

More Info

Availability
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