The hearing aid on the right has a standard receiver wire with NO sports lock fitted. The dome has also been removed to reveal the CERUSTOP wax guard on the tip.
The aid on the left is fitted with a POWER receiver wire (notice the difference in size / bulk. Also the extra ‘tail’ plastic SPORTS LOCK. I’ve removed the dome to show that the sports lock is in the WRONG POSITION. It has slipped down the body of the receiver block.
TO FIX THIS, PUSH THE SPORTS LOCK BACK DOWN THE BODY, or replace.

 

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