- Press the Menu key.
- Scroll down to Power Information.
- Navigate to Preferred battery drain mode.
- Press the Select key or the right arrow key to cycle between Right battery first, Left battery first, or Both batteries.
When Both batteries is selected, the CS12x selectively drains the battery packs until they are at the same percentage, and then drains them evenly until they are both dead.
The CS12x automatically switches to AC power when the AC adapter is connected.
Note: AC adapter does not recharge battery packs.