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The 1800 mah battery is identical to the 1100. So it should be just as waterproof. On everything I buy I have learned to use genuine batteries. While I have never had your type of problem, something else would go wonky.
Can't answer the second question.
Tim
Sent from my HTC Glacier using...
I am not near my manual but it is very near the back, if you have it :-)
Sorry I can't be more help.
Tim KD0QNT
Sent from my HTC Glacier using Tapatalk
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