A veteran 18650 cell that remains popular for its reliability and high capacity of 3500mAh. Sony Murata VTC5A 18650 Battery Sriko Batteries Go to product viewer dialog for this item.

If you prefer a finished product, current top-rated models categorized by use-case include: : BMX SolidSafe Air 5K

For custom projects or DIY power bank kits that require individual cells, high-performance lithium-ion models are the standard: Molicel P45B 21700 4500mAh 45A 3.7V Li-ion Battery (2pcs) $9.65(A$13.50) Cap Rouge Batteries& more Go to product viewer dialog for this item.

Widely considered one of the best all-around 21700 cells for high-drain applications. It offers 4500mAh capacity and an incredible 45A continuous discharge rate, making it ideal for fast-charging builds. Samsung Sniper Hog Light Cannon Battery 18650 Battery Store& more Go to product viewer dialog for this item.

A specialized 18650 cell for high-output needs, offering a 25A discharge rate, which is superior for powering energy-hungry devices in a smaller form factor. Recommended Ready-to-Use Power Banks

. A 10,000mAh default recommendation that includes a built-in USB-C cable and 30W output for roughly $30–$36. : Nestout 15000mAh Outdoor Battery Go to product viewer dialog for this item.

. This 5,000mAh model uses semi-solid-state cells and is noted for being ultra-thin (6.8mm) with Qi2 15W wireless charging. : BioLite Charge 100 Max Go to product viewer dialog for this item.