Most 30‑count battery string lights use AA batteries. Listings commonly require either 2 AA or 3 AA (often specified as AA alkaline). Product pages usually note that batteries are required but not included.
It varies by model. Some 30‑count strings are labeled for indoor use only, while others list indoor/outdoor use or note weather‑resistant or waterproof construction suitable for outdoor decorating.
Common wire colors include silver, black, white and clear. Materials specified in listings include copper or silver‑plated copper wire, plus plastic, PVC and polystyrene components.
