Battery pack removal and installation - ThinkPad SL300
DANGER: Use only the battery specified in the parts list for your computer. Any other battery could ignite or explode.
Removal steps of battery pack
Unlock the battery release lever [1]. Holding the battery release lever in the unlocked position [2], remove the battery pack in the direction shown by arrow [3].
When installing: Install the battery pack along the slide rails of the slot. Then make sure that the battery release lever is in the locked position.