No. The lithium-ion battery built into the transmitter (WL-T) is not user-replaceable due to its design.
CAUTION: Do not disassemble or modify the transmitter or its accessories, except as instructed in the Owner's Manual. Doing so may affect performance and may void eligibility for repair services.
NOTE: Charging issues may not always indicate a battery malfunction. Factors such as ambient temperature or prolonged disuse can also affect charging performance. If you are unsure whether the issue is caused by a battery malfunction, contact us through Backstage (Roland account required) or consult a local authorized dealer.