Suzuki builds light cars with small engines, and the batteries follow. A Swift, Dzire, Celerio or Baleno carries one of the smaller sizes on the market, easy to lift out and easy to reach. The downside is reserve. A dome light left on overnight or a dashcam wired to stay awake in parking mode can empty it by morning. Ask for a drain check if a new battery has gone flat before.
Most Suzukis have nothing to code, so a like-for-like swap with a memory saver is all it takes. The exceptions are versions with auto stop-start or the Smart Hybrid system, which adds a small lithium pack that works alongside the normal 12V battery. Those cars need an idle-stop rated 12V battery, and the lithium unit is not part of this service. The Jimny is a separate story, since owners load it with accessories.