My iPhone 5s has problem that the charge decreasing itself without using the phone I changed the battery it’s still the same and I put it in airplane mode it’s still the same problem how I fix it help please ?!

iphone 5s problem the charge it’s decreasing itself     My iPhone 5s has problem that the charge decreasing itself without using the phone I changed the battery it’s still the same and I put it in airplane mode it’s...
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