Title: Not compatible with Optura Pi
Review: I tried this battery twice with the optura Pi. First time I thought it was a defective battery and sent it back. After the replacement exhibited the same problems I contacted sunpac. It works, but you don't know how long it will last because it doesn't interface with the battery meter function in the camera. Similarly, you won't know when it is charging. They think it is because this battery has slightly more power.Go with the Canon battery, you get what you pay for.
Is this product review negative?