Charging the Battery
All Three Charge Level Indicators Blink
If all three Charge level indicators blink in green, it means that the battery’s internal temperature is not within 0°C - 40°C / 32°F - 104°F. The battery will start recharging when the internal temperature is within 0°C - 40°C / 32°F - 104°F.
If all the Calibration (discharge) status indicators blink in red or if all the lamps blink in red and green (including the <CAL/CHARGE> lamp), remove the battery from the charger and take it to your dealer or to nearest Canon Service Center.
Also, if a battery other than Battery Pack
The charger cannot charge any battery other than Battery Pack
When two battery packs are attached to the charger, the battery attached first will be charged first, then the other battery will be charged.
Although one battery can be recharged and another calibrated at the same time, two batteries cannot be recharged or calibrated at the same time. For battery calibration, it is best to do it after the battery is nearly exhausted. If you do the calibration with a fully charged battery, it will take approx. 12 hours to complete the calibration and the battery recharging (approx. 10 hours to discharge, and approx. 2 hours to fully recharge).
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