Canon EOS C300 Mark II Instruction Manual page 211

Use of genuine Canon accessories is recommended.
The message [Battery communication error] is displayed if you use a non-genuine Canon battery pack, and
user response is required. Note that Canon shall not be liable for any damages resulting from accidents, such
as malfunction or fire, that occur due to use of non-genuine Canon battery packs.
This mark identifies genuine Canon video accessories. When you use Canon video equipment, we
recommend Canon-brand accessories or products bearing the same mark.
NOTES
• You can have the camera's EF lens mount replaced by an EF lens mount with Cinema Lock or by a PL lens
mount. For details, consult the retail dealer from whom you purchased the camera or contact a Canon Service
Center.
Battery Packs
When you need extra battery packs, select only the BP-A30 or BP-A60 Battery
Pack.
Optional Accessories
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