xD-Picture Card capacity varies by card and camera firmware
Battery
Olympus model-specific rechargeable battery
Size
99 x 56 x 34 mm
Researched owner note
Why people still want it
Olympus Stylus 400 is best treated as an Olympus Stylus / mju / FE pocket camera for direct flash, small-bag carry, and the Olympus compact look when the lens and card workflow are proven. Judge this exact model around its 2003 release context, 4 MP, 1/2.5-inch (5.744 x 4.308 mm) CCD, 35-105 mm equivalent, F3.1-5.2, and xD Picture Card setup instead of the brand name alone. Alternate or regional names to search include mju 400 Digital, µ 400 Digital.
What owners like
People still look for Olympus Stylus 400 because it gives a real-camera flash workflow, brand-specific color and menus, and a tactile body that feels different from a phone. The useful part is the exact mix of 35-105 mm equivalent, F3.1-5.2, xD Picture Card, and the model's size when the seller proves the actual unit works.
Common complaints
Common complaints are xD card cost, weak LI-series batteries, stuck lens covers, flash or screen wear, tiny zoom mechanisms, and trendy mju/Stylus prices hiding untested units. For Olympus Stylus 400, the practical risk is the 2003-era condition: Olympus model-specific rechargeable battery means the charger, spare battery cost, and whether the pack still holds charge matter; xD Picture Card can be the hidden cost because cards and readers are less convenient than standard SD; and 35-105 mm equivalent, F3.1-5.2 and lens cover should open cleanly, since tiny pocket cameras are easy to damage in bags.
What to compare
Use Olympus Stylus 300, Olympus Stylus 410, Fujifilm FinePix Z2, and Canon PowerShot S400 DIGITAL ELPH as the real comparison set for Olympus Stylus 400. Compare pocket size, direct-flash look, charger availability, screen condition, and whether trend pricing is hiding a weak unit; the best buy is usually the listing with clearer working proof and easier accessories, not the one with the most familiar name.
Built from this model's specs plus source-backed Reddit / review / model list owner patterns.