a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; } Take on the toughest jobs with confidence using the AP 500 S—the most powerful battery in the STIHL AP System. Built with STIHL’s advanced power laminate cell technology, this professional‑grade battery delivers outstanding performance and an impressive lifespan of up to 2,500 charge cycles. With a significantly improved power‑to‑weight ratio, the AP 500 S produces 40% more power and offers 20% more capacity than the AP 300 S, all while maintaining manageable weight. Its broad compatibility across AP System tools makes switching between tasks fast and efficient. The integrated battery management system ensures consistent output by intelligently adjusting amperage to offset voltage reduction throughout the runtime. Durability is key, and the AP 500 S is built to last with an IPX4‑rated, weather‑resistant design that protects against splashing water in demanding work environments. Technical Details Battery cell technology Lithium-Ion AP 500 S Battery weight KG / LB 1.9 AP 500 S Battery energy WH 337 AP 500 S Rated voltage V 36 Features Power Boost MAXIMUM PERFORMANCE INCREASE. Thanks to intelligent electronics, STIHL power tools and batteries communicate with each other. If the device and battery are equipped with the POWER BOOST function, the battery always provides the maximum possible power for the respective application. In order to ensure optimum battery life, the device temporarily adjusts the power if it is used too intensively. Constant Power CONSTANT POWER, REGARDLESS OF BATTERY CHARGE STATUS. With other brands of battery tools, the performance usually decreases during work as the battery discharges. This is not the case with STIHL cordless power tools with CONSTANT POWER. Thanks to the intelligent electronics, your STIHL power tool works with consistently high power. Long Life VERY LONG BATTERY LIFE. STIHL batteries are extremely durable and resistant. They are designed for particularly high demands, as can typically occur in very intensive applications with high power requirements. The is based not only the exceptionally robust design, but also the special, particularly long-lasting battery cell technology. Thanks to their intelligent electronics, these STIHL batteries can also be charged more often and faster than average.