pro master FL190, User Manual, Page: 35 / 40

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• While Ni-MH or Lithium AA batteries may be used in your flash, using AA
batteries other than alkaline type may cause improper battery contact due to the
irregular shape of the battery contacts.
• Install the batteries in proper orientation as indicated in the battery chamber.
Installing the batteries incorrectly could cause the batteries to overheat, leak, or
explode.
• If you change the batteries after a period of sustained continuous firing of the
flash, the batteries may become warm or hot. This is normal, however you should
take care when handling the batteries.
• Always switch off the flash before changing the batteries.
• Do not attempt to open the flash because the electronic circuit contains high
voltage.
• If the flashgun is badly damaged and internal components are exposed, remove
the batteries from the flash. Contact customer service. Never try to repair the
flashgun by yourself.
• This product is not water-resistant. Keep it away from rain, snow, and high
humidity areas.