The Einhell 18 V 4. 0 Ah lithium-ion rechargeable battery is a member of the high-performance power X-Change family featuring multifunctional & interchangeable systems. Every device from the garden & tools ranges in the system series can be operated with any PXC rechargeable battery. The rechargeable batteries from the PXC system family can also be charged up with any of the chargers from the series. The advantages are obvious: a single rechargeable battery & a single charger for all tools not only saves significant costs of buying, that also eliminates the untidiness & chaos of having different rechargeable batteries & chargers for each separate tool. Maximum safety Is ensured by the proactive battery management system from Einhell. The batteries have a much longer service life, because the charging cycles are adjusted to the specific situation. The high-quality lithium-ion cells are resistant to the self-discharging normally associated with batteries. The batteries can be recharged whatever the charge status without incurring any damage. A three-step LED charge status indicator shows the actual charge status of the battery at a glance. State-of-the-art components provide permanent monitoring of the parameters during charging. A rubber-coated housing provides excellent impact protection & a firm hold as well. Integrated recessed handles enable the battery to be taken out effortlessly & Ergonomically.