Canon A580 PowerShot A580 Camera User Guide - Page 170

168 z The CB-5AH/CB-5AHE battery charger can only be used to charge Canon AA-size NiMH batteries NB-3AH. z Do not mix batteries with different purchase dates or different charge states. When recharging batteries, always recharge both of them at the same time. z Do not attempt to recharge fully charged batteries, as doing so may reduce or impair battery performance. Also, do not charge batteries for more than 24 consecutive hours. z Do not recharge batteries in enclosed areas that tend to retain heat. z Do not recharge the batteries until the LCD monitor displays the "Change the batteries" message. Repeatedly recharging batteries before they become depleted may cause batteries to lose capacity. z Wipe the battery terminals well with a dry cloth in the following situations, as the terminals may be soiled with oil from one's skin or other dirt: - If the battery usage time has considerably diminished - If the number of recordable images has considerably diminished - When charging the batteries (insert and remove the batteries two or three times before charging) - When charging completes in a space of a few minutes (the battery charger indicator remains lit) z You may not be able to fully charge the batteries due to their specifications right after purchase or after long periods of nonuse. If this happens, after fully charging them, use the batteries until their charge is depleted. After doing this several times, battery performance will be restored.