Gardena 8838 25-Volt 3.2 Ah Lithium-Ion Battery For 4025 Cordless Reel Lawn Mower 380 Li The powerful, reliable energy source for the GARDENA Accu Rechargeable Lawnmower 4025/380 Li. Easy-care, lithium-ion rechargeable batteries: always ready for use can be recharged at any time.