up to 950mAh: Low capacity. Mainly found in compact (pocket) cameras, action cameras, or older, small mirrorless models. Ideal for limited, everyday use
960 - 1950mAh: Medium capacity. This is the standard size for most amateur and semi-professional mirrorless and DSLR cameras on the market. It offers good autonomy for a typical outing or photo shoot.
2000mAh and above: High capacity. Intended for modern professional full-frame cameras, high-end DSLRs, and battery grips. An ideal choice for long setups, vlogging, continuous video, or professional shoots (e.g. weddings).
Lithium Ion (Li-Ion): The most common and modern type of battery for most digital cameras (Mirrorless/DSLR). They have a long lifespan, are not damaged if charged when partially full, and maintain a stable energy output.
Nickel-Metal (Ni-MH): Rechargeable batteries, usually in AA or AAA format. Mainly used in older compact cameras, external flashes (speedlights), and triggers.
Polymer-Lithium (Li-Po): An advanced variation of Li-ion. They are extremely lightweight and can take various shapes, which is why they are often used in action cameras (e.g. GoPro), drones, and very slim gadgets.