Charging the battery regularly will ensure your router is always ready for use. The battery can be charged even if it isn't completely flat. You can still use your router while the battery is charging.
Step 1 of 2
Connect the charger to your router
Connect the charger to the socket at the bottom of the router and to a power point.
Step 2 of 2
When the battery is fully charged, you can remove the charger from the power point and your router.