There are suitable chargers & boosters for every battery. The quality of the device is very important for the functioning of the battery, you want the battery to have the best performance and lifetime.
Each battery charger has a specific charging method, this determines how much and how long power is supplied and what must happen after charging. This method depends on the type of battery (GEL, AGM, Lithium-Ion, Pure Lead, etc.). Some batteries are very susceptible to overcharging and may be damaged as a result, other batteries must be reused soon after charging.