Abstract: An uninterruptible power supply (UPS) includes a first battery set and a second battery set. The UPS includes a charging circuit to charge the battery sets using alternating current (AC) power. The UPS includes a slot receptive to insertion of different types of output modules that each include an inverter to convert direct current (DC) power from the first and second battery sets, including a first type that connects the first and second battery sets in parallel and a second type that connects the battery first and second sets in series.

Abstract: Examples disclosed herein involve backup power management. In an example, an amount of backup power to power a load bank is estimated, a set of power sources are selected from a plurality of power sources based on respective states of charge of the plurality of power sources and the estimated amount of backup power, and the selected set of power sources are placed in circuit to provide backup power to the load bank via the selected set of power sources.

Abstract: According to some examples, solutions are provided for power distribution of input alternating current (AC) power to at least one power outlet while the input AC power is available, charging of a set of batteries by the input AC power while the input AC power is available, and power distribution of direct current (DC) power from the set of batteries to the power outlet when the input AC power is not available. For such examples, the power outlet is capable of conducting AC power and DC power to a load that is coupled to the power outlet and that can receive either AC power or DC power.

Abstract: Example implementations relate to concurrent alternating-current and direct-current. In one example, a device comprises a power module connected to a first power outlet, the power module connected to a second power outlet, and a controller to the power module to concurrently provide alternating-current (AC) power to the first power outlet and direct-current (DC) power to the second power outlet by switching a transistor including switching circuitry in response to an absence of AC input power to the device.

Abstract: An example system is provided herein. The system includes a fuel cell coupled to the set of electronic components. The fuel cell provides power to the set of electronic components when a set of conditions are met.

Abstract: In one example, a system for parallel output of backup power modules includes a first backup power module coupled to an input and a first output of an enclosure, a second backup power module coupled to the input and a second output of the enclosure, wherein the second backup power module is coupled in parallel with the first backup power module, and a switch coupling the first backup power module and the first output of the enclosure to the second output of the enclosure.

Abstract: Examples herein disclose determining when a battery module is below a full charge and selecting a subset of loads based on a prioritization among multiple loads. The selected subset of loads is to receive power from the battery module. The examples herein deliver power to the selected subset of loads.

Abstract: In one example, a system for bypass switch control includes a controller coupled to a number of backup power modules and to a number of bypass switches that correspond to each of the number of backup power modules, wherein the controller activates a bypass switch when a corresponding backup power module is deactivated.

Abstract: A method for preserving volatile memory across a computer system disruption includes identifying a set of volatile memory. The set of volatile memory represents a portion of data in volatile memory to preserve during a system disruption. The method includes receiving a system event. The system event indicates that a computer system disruption will occur and that the set of volatile memory is to be written to a stable storage device. The method includes writing the set of volatile memory to the stable storage device to create a stored data set.

Abstract: According to an example, a battery is charged using a charge voltage based on a present state of charge of the battery and a present ambient temperature of the battery. Additionally, the charge voltage may be based on the present state of charge of the battery, the present ambient temperature of the battery, and an age of the battery. The charge voltage may be retrieved from a lookup table that includes a plurality of reference charge voltage values at which to charge the battery for different ambient temperatures, different states of charge, or different ages of the battery.

Abstract: Example implementations relate to partitioning memory modules into volatile and non-volatile portions. For example, a system includes a memory controller to partition a memory module into a non-volatile portion and a volatile portion and to identify persistent data to be backed up during a power loss condition. The memory controller is further to transfer the persistent data from the volatile portion of the memory module to the non-volatile portion of the memory module, in response to the power loss condition.

Abstract: Examples disclosed herein involve backup power management. In an example, an amount of backup power to power a load bank is estimated, a set of power sources are selected from a plurality of power sources based on respective states of charge of the plurality of power sources and the estimated amount of backup power, and the selected set of power sources are placed in circuit to provide backup power to the load bank via the selected set of power sources.

Abstract: Various examples herein disclose a system comprising a power source, multiple cards, and a power connector. The power source is mounted on multiple cards. The multiple cards each include an edge configured to fit into a memory slot. The power connector is coupled to the power source and located on a side of the multiple cards other than the edge.

Abstract: Various examples herein disclose a system comprising a power source, multiple cards, and a power connector. The power source is mounted on multiple cards. The multiple cards each include an edge configured to fit into a memory slot. The power connector is coupled to the power source and located on a side of the multiple cards other than the edge.

Abstract: An uninterruptible power supply (UPS) includes a first battery set and a second battery set. The UPS includes a charging circuit to charge the battery sets using alternating current (AC) power. The UPS includes a slot receptive to insertion of different types of output modules that each include an inverter to convert direct current (DC) power from the first and second battery sets, including a first type that connects the first and second battery sets in parallel and a second type that connects the battery first and second sets in series.

Abstract: According to an example, a plurality of battery modules may be dimensioned to fit within a form factor.

Abstract: In an example, an apparatus includes a charger for rectifying a direct current charge from an input alternating current voltage. A battery pack stores the direct current charge in a first string of battery modules and a second string of battery modules. An inverter is connected directly to the battery pack and inverts the direct current voltage to an output alternating current voltage. In one example, the first string of battery modules is directly connected to the inverter in parallel with the second string of battery modules.

Abstract: A system for regulating voltage and current capability for a battery is described herein. The system includes at least two parallel battery strings to power a system load, where each battery string acts independently of another battery string. The system also includes a current sensor to determine an individual discharging current through each battery string in a circuit. The system also includes a switch to power on a particular battery string to support the system load by discharging current.

Abstract: Example implementations relate to server node shutdown. For example, a server node shutdown can include detecting a secondary power supply integrated into a server node, receiving a primary power supply interruption signal from the secondary power supply, and initiating a sequenced shutdown of the server node in response to receiving the signal using the secondary power supply.

Abstract: Example implementations relate to placing loads in a self-refresh mode using a shared backup power supply. For example, a shared backup power supply system can include a node coupled to a shared backup power supply. The node can include a plurality of loads that include volatile memory and a processing resource to place the plurality of loads in a self-refresh mode in response to a failure of a primary power supply. A shared backup power supply system can also include the shared backup power supply to provide backup power to the plurality of loads in the self-refresh mode in response to the failure of the primary power supply.