If you're having charging issues, please make sure you seat the transmitter completely into the receiver, otherwise the transmitter will not charge. For more details, see this article: Relay G10 FAQ   We have designed the G10 transmitter to fit into almost any guitar. However, we anticipate that there will be some rare cases where the transmitter does not fit into a given guitar. If the G10 transmitter is inserted into your guitar and the transmitter's actuator pin is not engaged, the