It's not very reliable. For the battery, the charging process needs to be carried out in a safe environment, fast charging does not have much benefit for the battery, occasionally used once or twice is not too much of a problem, but if long-term use, battery damage and life are problems.
If it is a lead-acid battery, too fast charging speed will produce gas, and if the expansion is blocked, it will produce an explosion. If the lithium battery is charged too fast, it may short-circuit and fire.