External batteries are outside of the UPS power supply and usually have a separate battery cabinet that is not integrated with the UPS power supply. Generally UPS power supplies with external batteries are higher. Its battery capacity or the number of new battery packs can be used for the purpose of extending the power supply. Built-in battery in the UPS power supply, the built-in battery and UPS power supply is integrated. Generally UPS power supply built-in battery is relatively small, which contains a small battery capacity is generally small, rarely expand the battery pack.
Due to the limitations of space within the UPS chassis, the built-in UPS power battery usually has a small capacity, and the charger current is relatively small. Standby power supply time at full load is about 10 minutes. The capacity of the external battery can be configured according to the size of the load and the backup time itself, the time can usually be more than 8 hours, so the UPS battery capacity is relatively large, the host charger current is also designed to be larger. If the host charging current is not enough, you have to configure another external charger. the difference between UPS built-in battery and external battery.
