Your battery will last 1-3 weeks between charges, depending on how much you use it. The action that drains the battery the fastest is the flashlight. If you accidentally leave the flashlight on, your battery may only last for about 1-2 hours.
There is a battery indicator on your OmniFob and the app. Be sure to plug in your OmniFob when the battery indicator gets low.
To recharge your battery, just plug the provided USB-C cable into any USB charger or computer. As soon as you plug it in the red LED will come on. When the battery is fully charged, the red LED will turn off.