It depends on how the Transmitter and its battery have been maintained, this battery usually lasts between 2 and 5 years.
A person with normal mechanical skills can replace the battery in this receiver.
If it is for a necklace sold by Collares Electrónicos ¡Y Más! We do not charge to replace the battery. If it has not been sold by Electronic Necklaces And More! we charge € 5 for this service.
Normally in stock.
Please see the shipping costs in the tab above