The feeling I used is very good and the size of carrying is just fine. We are using Isuzu wing car battery solution for water replenishment. There is no gap to check when inserting the battery liquid. If it is this type of water repellent, the amount of water to be repaired is also automatic so it will be handy. If you want to replenish a large car battery to replenish it a little more capacity and you want a lot of sensor failure so it is good to exchange parts easily.
To tell the truth, I wanted a thing of 5 liter tank. It is small in 3 liter tanks when used in a large car. However, I made it because it seems that pumps, foundations, nozzles etc can be purchased as parts.