Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to fix a cell phone [title] Check the batteries. [step] Batteries are one of the first parts that fail on phones. It's also one of the parts that are very easy to fix.

Ending1: For instance, your phone might have a low charge. You need to replace the batteries on all 4 chargers. Ending2: When your phone quickly runs out of battery or it feels bloated, it's time to go to the nearest electronic store and purchase a new battery pack. [substeps] When purchasing a new battery for your phone, remember to pick the one that's specifically for your phone only. Ending3: But they should still work once you've placed the phone somewhere safe. [substeps] Check the front of the car for burnt-out or bent batteries. Ending4: Without properly shopping around for new batteries, you might find yourself begging for them every time you get a new one. Call your phone's battery manager and tell them to point out the new battery in your phone for you.

Answer format: ending1/ending2/ending3/ending4