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Recommended Operating and Storage Temperature
Ranges
condition minimum maximum
Operating Temperature 0˚C (32˚F) 45˚C (115˚F)
Storage Temperature -20˚C (-13˚F) 55˚C (131˚F)
Relative Humidity 0% 95%
Expected Life
The expected life of the M Batteries is 1 year.
The expected life of the M Battery Charger is 5 years.
Ingress Protection (IP) Ratings
The following product configurations have an IP rating of
54 (protection against dust; protection against failure due
to water splashes from all directions):
• The Naída™ CI M90 sound processor with an
M Battery or M Zn-Air Battery Pak, an M T-Mic™
microphone or M Acoustic Earhook, and a Slim HP,
Slim HP Mic, or Slim HP Standard.
The following product configuration has an IP rating of 57
(protection against dust; protection against failure due
to one-time immersion for 30 minutes to a depth up to
1meter and after drying overnight in a drying system):
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