Updated 29 Apr 2016

Energizer

Ultimate Lithium

Bottom line: The Energizer Ultimate Lithium has very good overall performance. But its low-drain value for money is poor and its high-drain value for money is just OK.

Ultimate Lithium
Consumer recommended
87
Price guide

$6.25

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Test results

Overall score
Very good
87
Overall value
Just OK
4.5/10
Performance (low-drain)
Very good
8.5/10
Performance (high-drain)
Very good
8.9/10
Value (low-drain)
Poor
3.7/10
Value (high-drain)
Just OK
5.2/10

Good points

  • Very good low-drain endurance.
  • Excellent low-drain energy.
  • Very good high-drain endurance.
  • Excellent high-drain energy.

But

  • Poor low-drain value for money.
  • Just OK high-drain value for money.

Additional scores

  • Endurance (low-drain) (/10): 8.1
  • Endurance (high-drain) (/10): 8.8
  • Energy (low-drain) (/10): 9.0
  • Energy (high-drain) (/10): 9.0

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
$6.25

Specifications

Size
AA
Type
Lithium
Cost per hour (low-drain)
0.12
Cost per hour (high-drain)
1.39
Capacity (mAh) (low-drain)
3158
Capacity (mAh) (high-drain)
3146
Time to empty (low-drain) (hrs:mins)
51:70
Time to empty (high-drain) (hrs:mins)
4:30

More Info

Availability
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