Battery designed for repeated charging.

UPS continuously powering loads through an inverter.

Figure-eight appliance power connector.

Precision resistor for measuring current.

Lithium-ion rechargeable battery.

Circuit converting battery DC to AC output.

Oscillator using a quartz crystal.

Lithium-polymer rechargeable battery.

Battery supplying backup energy in a UPS.

Piezoelectric component used for frequency control.