Abstract: A vent cap includes a hollow vent cover which is inserted into a battery vent hole and a flange which retains the vent cap from overinsertion into the vent hole. An aperture near the top of the vent cap communicates with the hollow interior of the vent cover and forms an exhaust path for discharge of gases from within the battery. A flame protection device, for example, a microporous disc, is disposed within the vent cover so that gases must pass through the disc in order to exit the battery through the aperture. A splash guard may be provided in the vent cover to reduce electrolyte leakage into the exhaust path and onto the flame arrestor, thereby inhibiting electrolyte leakage from the battery.