Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to turn on a device with a universal remote [title] Put batteries into the universal remote. [step] Most remotes come with batteries, but you may have to purchase your own. The battery type will be listed on the remote's packaging.

Ending1: Refer to the instruction manual for your remote before making any use of it. [substeps] Some devices require batteries to be fully charged before using them. Ending2: Insert the batteries into the remote in the correct order. You can then make sure the battery is charging properly before moving on to the next step. Ending3: [title] Swipe from one end of the remote to the other. [step] A blue button will appear to the right of the remote. Ending4: [substeps] Some universal remotes lose the programmed codes when both batteries are removed. When replacing batteries, do so one battery at a time.

Answer format: ending1/ending2/ending3/ending4