First, dust, oil, white powder, etc. are easily wiped clean by the wet cloth on the outside of the sprinkler battery, on the panel, on the pile head (that is, positive and negative poles). Wash the sprinkler battery often. The pile head of the sprinkler battery will not accumulate white etched powder and its service life will be longer. Second, open the battery and add water cover to see if the water level is in the normal position. Generally, there will be upper and lower mark lines on the side of the battery for your reference. If it is found that the water level is lower than the subscript line, distilled water must be added. If you do not get distilled water, tap water can be used for emergency. Water can not be added too much, the standard is added to the middle of the upper and lower markings. Third, check whether the battery is charging properly. After starting the sprinkler engine, measure the voltage of the battery's two poles. It must be more than 13V to be normal. Found that the charging voltage is too low, you need to ask a professional to repair the charging system. The same can also be used visually: After the engine is started, open the battery cap to see if there are any bubbles in each cell. The normal situation is that there are constantly bubbles emerging from the water surface, and the more oil will be used, the more it will be. If you find that there is no bubbling, it is likely that the charging system is defective.