WATER MISER Battery Caps



  • Water Miser Battery Vent Caps Reduce Evaporation
  • Internal Condenser Reduces Watering Intervals by up to 30%
  • Reduces Acid Fumes & Emissions
  • Keeps Top of Batteries Drier
  • Water Miser Caps Reduce Maintenance Costs
  • Internal Spark-Flame Arrestor
  • Acid-Proof Rubber Seal Washer (Included)
  • Flip-Open Top Allows Faster Inspection & Watering
  • Flip-Top Rotates 360° for Easy Positioning
  • No Need to Remove Vent Cap from Battery
  • Virtually Eliminates Dropped / Misplaced / Lost Battery Caps
  • 1/4-Turn Bayonet Style Mount

Quantity discount for 100 or more Water Misers.
Click here to inquire.

See the difference between Part #s here.

Which model should you choose?
#2000 Our most popular model. Recommended for most applications.
#2000C Larger opening for easier watering and level checking. Extra height reduces potential overflow.
#2000EX Our tallest model. Maximum protection against potential overflow. Not suitable for limited space.

To buy, first select an item in the drop down box by clicking on the “▼” below. Then enter the quantity, then click the “Add to cart” button, then click the “Checkout” button on the left.

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Saves Money

  • WATER MISER Battery Caps reduce electrolyte loss through evaporation by up to 30%. Electrolyte vapors enter a condensation chamber where the liquid is trapped and then returned back into the battery cell. The gases then pass through a special hydrophobic cindered disk which further reduces moisture loss.
  • Reduces maintenance time. Removing the Water Miser vent cap from the battery is unnecessary. Just flip open the cap to inspect or to add water.
  • Water less often because of reduced electrolyte loss. This miserly cap quickly pays for itself by saving time and labor expense.
  • Battery stays drier, reducing voltage loss due to grounding.

Environmentally Friendly

  • Water Miser Battery Caps reduce fumes and airborne particles, creating a cleaner environment for everyone. Manufacturers can also use in their charging areas to reduce fumes. Sulfuric acid fumes are virtually eliminated.


  • Water Miser Battery Caps include a spark arrestor that allows pressurized gases to exit the battery, but stops sparks or flames from entering the cells.
  • Reduces repetitive motion fatigue. During maintenance, the need to remove the cap from the battery by twisting it is eliminated. The flip top cap provides easy access.
  • Less exposure to fumes and sulfuric acid. No more handling of acid-soaked vent caps.

User Friendly

  • The Water Misers flip-top cap fully rotates to any desired position, allowing it to function where space is limited due to cables, terminals, etc.
  • Internal splash guard reduces splash when filling the battery. This keeps the outside of the battery drier and the liquid in the cell where it belongs.
  •  Model #2000 Water Miser Battery Cap fits all single cell watering fillers with nozzle diameters of up to 3/4″ (#2000C & #2000CE up to 7/8″).
  • The standard bayonet mount fits most forklift, golf cart and floor scrubber batteries.

WATER MISER Battery Caps are available in two other styles listed below. Click on the links for further information.
Water Miser Stationary-Top Battery Cap
Water Miser Flip-Top Push-in Battery Cap

Additional information

Weight0.04 lbs
Dimensions2.0 × 1.48 × 1.3 in
Part #

2000 (standard), 2000C (medium), 2000EX (tall)