STIHL batteries can be charged with either the AL 100 standard charger or the AL 300 respecitively AL 500 quick charger. Each charger features a different charging capacity (Watt). The quick chargers have active cooling for even faster charging. In addition, the AL 500 features a housing base for wall mounting. When used for prolonged periods - by professional gardeners, for example - it is advisable to use two batteries to save time.
A comparison of battery charging times
The batteries can be charged several hundred times without any appreciable loss of energy. Here you can see an overview of the required charging times of the various batteries.