Power Supplies & Batteries
Power supplies and batteries provide portable or fixed electrical energy to designs. The right energy source determines a device's runtime and reliability.
🔍 Search Power Supplies & Batteries partsCompare live price and stock across distributors for this category.
Li-ion/LiPo cells, battery holders, AC-DC modules, charge-management ICs and supercapacitors are the main types. Voltage, capacity (mAh), discharge current and charging method matter when choosing one. Portable devices, backup power and embedded systems are the most common applications.
Featured Power Supplies & Batteries
See all Power Supplies & Batteries →Popular in-catalog parts in this category — compare price and stock across distributors.
Top manufacturers
All manufacturers →Leading manufacturers known for Power Supplies & Batteries — explore their component lineup.
Learn about Power Supplies & Batteries
Free, in-depth guides explaining how these components work and where they're used.
In-depth guides for this category are on the way.
Frequently asked questions
What does the mAh rating mean?+
mAh (milliamp-hours) indicates a battery's capacity: a 2000 mAh battery can theoretically supply 2000 mA for 1 hour. The higher the value, the longer the device runs.
Why does a Li-ion battery need a protection circuit?+
Li-ion cells can be dangerous when overcharged, over-discharged or shorted. A protection circuit (BMS) prevents these conditions for safe, long-lasting use.
How do I choose the right power supply?+
The device's operating voltage and maximum current need are decisive. For portability use a battery + charge management; for fixed use pick an AC-DC module with adequate current.