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ENERGIZERBATTERYMANUFACTURING
VERSION1.2
Figure7:ComparisonofPerformanceunderContinuousConstantPower
AAAA PP355
25 mW 24 88
50 mW 11 38
75 mW 6 24
100 mW 4 15
Continuous Discharge Time (hrs)
2.2‐‐PerformanceatOtherEnvironmentalConditions
WhenaZincAirbatteryisexposedtoanon‐standardenvironment,adrivingforceforwatertransportin
oroutofthebatteryexists.Movementofwatervaporintothebatterycanfillvoidspaceintheanode
cavityun derhighhumidityenvironments,andmovementofwatervaporout
ofthebatterycandryout
theelectrolyteinlowhumidityenvironments.Eithersituationcandecreasebatteryperformanceover
time.
Understanding the environmental conditions that a battery might encounter is criti cal to estimating
battery performance.A study was done at Energizer to determine realistic extreme conditions for
battery testing, using climate
data from 61 cities across the globe.These cities represent the major
marketsforbothdevicesandbatteries.Combinationsofdailymorningandafternoontemperatureand
humiditywerecompiledandanalyzedtodeterminereasonabletemperatureandhumidityextremes.
HotandHumidConditions
:
ZincAirPrismaticbatteriescantakeonwaterwhenexposedtohotandhumidconditions.Thiscanlimit
batteryperformance bytakingupvoidvolume intheairelectrodeandanodecompartment.At35°C
and 75% RH conditions, there isa driving force for watergain larger than 99% of
conditions seen in
combinedindoorandoutdoordatafromthetop61citiesglobally.ServicetestswiththePP355under
theseconditionsshowverygoodserviceevenat1hrperdayintermittency.
HotandAridConditions
:
Zinc Air Prismatic batteries can lose water when exposed to hot and arid conditions which can limit
batteryperformancebydryingoutthebattery.Under35°Cand25%RHconditions,thereisadriving
forceforwaterlosslargerthan99%ofconditionsseenincombinedindoorandoutdoordata
fromthe
top61citiesglobally.ServicetestingwiththePP355attheseconditionsshowsverygoodserviceeven
at1hrperdayintermittency.