Not to be confused with lower cost solar lights that usually last not much more than a season, these professional outdoor solar lights have proper high capacity long life batteries to last several years. The batteries are replaceable being either Lead/acid dry cell ( as used in Alarm systems etc. as back up batteries) or the long life Lithium Ion rechargeable batteries that have no memory effect- that is they will always retain a full charge unlike Nickel Cadmium batteries that will rapidly lose their storage ability.
The highly sensitive large solar panels will charge even on the cloudiest of days in winter, so can safely be used all year. Solar Lighting you can rely on !