P a g e 9
Lower Temperature Conditions:
Air holds less moisture as temperature decreases, and the difference between low and high relative humidity becomes less significant. At 0°C, the difference between the humidity of the PP355 and the environment is negligible. While the service obtained from a PP355 at temperatures lower than standard conditions is less, the loss is similar to Alkaline batteries. In general the “up to 3X” service advantage for Zinc Air batteries over Alkaline batteries is maintained.
Figure 9: Service Summary for Zinc Air Prismatic Batteries at Various Environmental Conditions
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| Humid | Typical | Arid | Cold | |
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| (35°C / 75% RH) | (21°C / 50% RH) | (35°C / 25% RH) | (0°C) | |
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| 50 mW | 45 hrs | 38 hrs | 40 hrs | 12 hrs | |
| Continuous | (2 days) | (2 days) | (2 days) | (0.5 days) | |
PP355 |
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50 mW | 38 hrs | 36 hrs | 30 hrs | 16 hrs | ||
1h per 12hr | (19 days) | (18 days) | (15 days) | (8 days) | ||
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| 50 mW | 25 hrs | 30 hrs | 17 hrs | - | |
| 1h per 24hr | (25 days) | (30 days) | (17 days) | ||
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AAAA Alkaline | 50 mW | generally about 12 hrs (0.5 days) | 5 hrs | |||
for these temperatures and all intermittencies | (0.25 days) | |||||
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Each battery was exposed to the specified conditions for the entire test duration.
Figure 9 demonstrates the service obtained from a PP355 battery at 35°C/75% RH, 35°C/25% RH, and 0°C conditions. The data presented with units of hours represent the runtime that the battery delivered, while the values in parentheses indicate the duration of the test in days. In summary, the PP355 battery sustains a significant performance advantage over similar volume Alkaline batteries with varying intermittency in extreme temperature and humidity conditions.
2.3 ‐‐ Pulse Capability
The pulse capability of Zinc Air batteries is dependent on the instantaneous amount of oxygen available at the air electrode at a given time. While the PP355 battery can continuously discharge at rates up to 100 mA, the battery can provide significantly more current in short bursts. Figure 8 demonstrates that a fresh PP355 battery can provide pulses of up to 1500 mA, depending on the duration of the pulse. The pulse capability of a Zinc Air battery can also be affected by the frequency of the pulses. Pulse capability will drop over time without sufficient time for more oxygen to enter the air electrode.
ENERGIZER BATTERY MANUFACTURING
VERSION 1.2