A control unit for an electronic vapor provision system includes a battery for providing electrical power to a heater which is used to produce vapor. The battery is a lithium iron phosphate battery. The battery provides an output voltage which remains at an approximately constant voltage level as the battery is discharged.

A power management apparatus configured to control charge and discharge of the battery, power discharged from the battery being supplied to a power consumption apparatus, the power management apparatus includes a memory, and a processor coupled to the memory and configured to receive, from the power consumption apparatus, first information indicating a first power amount which is predicted to be used in the power consumption apparatus, determine, based on the first power amount, a first value that is a value regarding a residual amount of the battery and is used for determining which of the charge and the discharge of the battery is to be preferentially executed, and control, based on the determined first value and the residual amount of the battery, the charge and the discharge of the battery.

A portable power bank for charging a rechargeable device is described, and a dynamic charging efficiency is monitored while the power bank is charging the rechargeable device. Particularly, instantaneous power output of a battery of the power bank is compared to power received by a battery of the rechargeable device to determine efficiency. The charging of the rechargeable device by the power bank is interrupted and/or resumed based upon the charging efficiency at any given time, thereby preventing inefficient use of the power bank.

An energy harvesting device (CTH) installed in an electrical distribution system (EDS) for powering ancillary electrical devices (AD) used in the distribution system. The device includes a first voltage regulator circuit (CC) configured to produce a voltage matched to a power curve of a current transformer (CT) to which the device is electrically coupled. The device also includes a second and separate voltage regulator circuit (SVR) which continuously operates to maximize the amount of electrical energy recovered from the current transformer.

Devices, systems, and methods may use a low current power source to charge an intermediate storage unit, providing sufficient electric power to perform various device functions. A voltage of the intermediate storage unit may be monitored using a voltage monitoring circuit, and a primary storage unit may be charged using current from the intermediate storage unit when the voltage of the intermediate storage unit meets a threshold.

Devices, systems, and methods may use a low current power source to charge an intermediate storage unit, providing sufficient electric power to perform various device functions. A voltage of the intermediate storage unit may be monitored using a voltage monitoring circuit, and a primary storage unit may be charged using current from the intermediate storage unit when the voltage of the intermediate storage unit meets a threshold.

A system for powering a sliding gate including a solar power assembly with a solar panel in electronic communication with a device for regulating voltage and a high-capacity battery electronically connected to the device for regulating voltage, and a safety edge with a sensor wherein the safety edge is configured to receive power independently from both the device for regulating voltage and the high-capacity battery.

A battery-powered motor may include an electric motor, a controller, and a housing. The electric motor may be wound to enable the battery-powered motor to achieve a non-limited motor maximum motor revolutions per minute (RPM) for at least one specified battery. The controlling current may include limiting current to the electric motor at lower RPMs, and limiting the current to prevent the RPM of the electric motor from exceeding a limited maximum motor RPM which is lower than the non-limited motor maximum RPM. The housing may enclose the electric motor and the controller and the specified battery. The housing may have a form factor to engage with a machine that engages with an internal combustion engine that has a maximum engine RPM that is approximately the same as the limited maximum motor RPM.

A battery-powered motor may include an electric motor, a controller, and a housing. The electric motor may be wound to enable the battery-powered motor to achieve a non-limited motor maximum motor revolutions per minute (RPM) for at least one specified battery. The controlling current may include limiting current to the electric motor at lower RPMs, and limiting the current to prevent the RPM of the electric motor from exceeding a limited maximum motor RPM which is lower than the non-limited motor maximum RPM. The housing may enclose the electric motor and the controller and the specified battery. The housing may have a form factor to engage with a machine that engages with an internal combustion engine that has a maximum engine RPM that is approximately the same as the limited maximum motor RPM.

A system in a wireless network comprising a tower, a first radio unit, a power supply unit, a supplementary power source and a power control unit arranged to supply electric power to the first radio unit. The power control unit is operative to obtain a scheduled power demand related to an amount of electric power required in the first radio unit for transmissions scheduled in an imminent time interval as a resource block or subframe. The power control unit is further operative to supply electric power to the first radio unit from the power supply unit if the power demand does not exceed a power threshold, or from the power supply unit and the supplementary power source if the power demand exceeds the power threshold.