HQRP Battery for Wacom Intuos4 Wireless Pen Tablet PTK-540WL PTK-540WL-EN PTK540WL 1UF102350P-WCM-03 1UF102350P-WCM-04 ACK-40203 ACK-40203-BX CP-GWL04 XLA-C330 + HQRP Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.7V; Capacity: 1600 mAh; Li-Ion; 100% compatible with Original Battery; 1 Year warranty!