A jet ski battery typically operates at 12 volts.

A jet ski battery is a 12-volt lead-acid battery, similar to those used in cars and motorcycles. It provides the necessary power to start the engine and run the electrical systems. Most jet ski batteries have a capacity between 10Ah and 30Ah, depending on the model and manufacturer.

Types of jet ski batteries

  • Lead-acid batteries (most common)
  • AGM (Absorbent Glass Mat) batteries
  • Lithium-ion batteries (less common, higher cost)

Comparison of battery types

Type Weight Maintenance Lifespan
Lead-acid Heavy Requires regular maintenance 3-5 years
AGM Moderate Low maintenance 4-6 years
Lithium-ion Light Minimal maintenance 5-8 years

Maintaining your jet ski battery

  1. Charge regularly, especially during off-season
  2. Clean terminals to prevent corrosion
  3. Store in a cool, dry place when not in use
  4. Check water levels in lead-acid batteries

Common battery sizes for jet skis

  • Group 24
  • Group 25
  • Group 26
  • Group 27

Voltage specifications

  • Nominal voltage: 12V
  • Full charge voltage: 12.6-12.8V
  • Voltage under load: 12.4-12.6V
  • Low voltage warning: 12.0V