Canon Knowledge Base - How the CHG (charge) indicator lights up while the battery is charging and what it means if the indicator is blinking (VIXIA HF G20 / LEGRIA HF G25)
Amazon.com : Canon HF G25 Camcorder External Microphone Vidpro XM-CS Condenser Stereo XY Microphone Kit for DSLR's, Video camcorders and Audio recorders - with a Pack of 4 AA NiMH Rechargable Batteries -
Canon DM 100 - microphone (2591B002AA)
Canon SM-V1 Surround Microphone for Legria HF S-Series and HF M-Series Digital Camcorder: Amazon.co.uk: Electronics & Photo