Yes. Wi‑Fi SD cards generally use more power than a normal SD card because they contain extra electronics and a Wi‑Fi radio. In real use, users do report shorter battery life, and the impact can be significant while wireless transfer is active. Some cameras let you disable the card’s wireless mode, which can help.

Other things to consider:

• Performance: these cards may be slower than top non‑Wi‑Fi cards, so write speed can be a limitation depending on the model.
• Compatibility: not every camera handles Wi‑Fi SD features the same way, so check whether your camera supports managing or disabling the card’s wireless functions.
• Use case: if you value immediate wireless transfer and easy viewing/editing on another device, the battery tradeoff may be worth it.
• Power planning: carrying a spare battery is a sensible idea if you plan to use wireless transfer regularly.

So the main downside is reduced battery life, with possible speed and compatibility considerations depending on your camera and the card.