In Apex Legends, every hero has a special ability that takes a lot of time to charge. Fortunately, you can speed up the process! This is especially useful in case of heroes like Lifeline. To speed up the process of charging, you'll need a special item - Ultimate Accelerant.
Where to find Ultimate Accelerant?
Unfortunately, in Apex Legends there aren't any fixed locations where you can find Ultimate Accelerant. It appears in random locations around King's Canyon. You'll surely encounter the item when exploring the map. You can also get it from your party members or pick-up from defeated opponents.
How to use the Ultimate Accelerant?
To use Ultimate Accelerant, enter the inventory, point your mouse to the item and use the action button. Watch out and avoid dropping the item (which is performed by pressing the right mouse button). Using Ultimate Accelerant takes 7 seconds, so stay in cover while you're using the item.