1lt distilled water top-up container for boat and vehicle batteries.

Automatic battery filler, dispenses distilled water and automatically stops when the correct level of electrolyte is reached in each battery cell.

Popular with hard to reach batteries, such as narrowboat and other marine batteries for an accurate and easy 'clean' fill.

About the Battery Filler Bottle:
The principle of operation is that the spout is depressed opening the filler fully, the distilled water is added until the electrolyte level rises to meet the end of the filler spout, blocking the airway into the bottle and stopping the flow, the filler is lifted off and the spring-loaded valve shuts.