WATER MISER Battery Caps


Water Miser Benefits:

  • Reduces evaporation of electrolyte
  • Internal condenser reduces watering intervals by up to 30%
  • Reduces acid fumes & emissions
  • Keeps top of batteries drier
  • Reduces maintenance costs
  • Contains internal flame arrestor
  • Includes acid-proof rubber seal washer
  • The flip-open top allows faster inspection & watering
  • Flip-top rotates 360° for easy positioning
  • No need to remove vent cap from the battery
  • Virtually eliminates dropped, misplaced or lost battery caps
  • Standard 1/4-Turn bayonet-style mount

Water Miser Battery Cap Models

#2000 This is our most popular model and is recommended for most applications.

#2000C This model has a larger opening for easier watering and level checking. Extra height reduces potential overflow.

#2000EX This is our tallest model. It provides maximum protection against potential overflow. It may not be suitable where space is limited. Compare the difference between all 3 models by viewing the Water Miser vent cap drawing.

Water Miser Quantity Discounts

Part NumberQuantityPrice
"500 +Contact Us
"500 +Contact Us
"500 +Contact Us
To buy this Water Miser battery cap, select a part number in the drop-down box below. Then enter the quantity and select the Add to cart button. Then select the Checkout button that appears at the top left.

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Water Miser Benefits

Saves Money

  • WATER MISER battery caps reduce electrolyte loss due to evaporation by up to 30%. Electrolyte vapors enter a condensation chamber where the liquid is trapped and then returned back into the battery cell. In addition, the vapors pass through a special hydrophobic cindered disk which further reduces moisture loss.
  • Reduces battery maintenance time. Removing the vent caps from the battery is no longer necessary. Simply flip open the top to inspect the electrolyte level or to add water.
  • Add water less often because of reduced electrolyte loss. This miserly cap quickly pays for itself by saving time and labor expense.
  • The battery stays drier, reducing voltage loss due to electricity being conducted across a wet surface.

Environmentally Friendly

  • Water Misers reduce fumes and airborne particles, creating a cleaner environment for everyone. Battery manufacturers use them in their charging areas to reduce fumes. Sulfuric acid fumes that are normally emitted from the battery are virtually eliminated.


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


  • The Water Misers’ flip-top cap can be rotated to any desired position, allowing it to function where space is limited due to battery cables, terminals, or terminal covers.
  • The internal splash guard reduces splashing when filling the battery. As a result, this keeps the outside of the battery drier and the liquid in the cell where it belongs.
  •  Our model #2000 Water Miser battery cap fits all battery watering guns with a nozzle diameter 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 that are listed below. Select either link for more information.

Water Miser Stationary-Top Battery Cap
Water Miser Flip-Top Push-in Battery Cap

Additional information

Weight 0.04 lbs
Dimensions 2.0 × 1.48 × 1.3 in
Part #

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

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