The Poulan Pro 40-Volt lithium-ion battery charger is designed to charge any Poulan Pro 40-Volt lithium-ion battery pack. The charging times, from a fully depleted condition, for the 2Ah battery pack (PPB402AH) is approximately 1 hour, and the 4Ah battery pack (PPB404AH) is approximately 2 hours. Backed by a 2 year warranty.