MULTIPROCESSING TECHNOLOGY FAQs Frequently Asked Questions | JUST RECEIVED MY APEX AND IT WILL NOT TURN ON. WHAT SHOULD 1 DO? The Apex uses a lithium rechargeable battery. These batteries are shipped from the factory with a minimal amount of charge. Sometimes this charge is used up during production testing. We recommend charging the Apex for 4 to 5 hours prior to use to ensure a full charge.