Part of Honda's Universal System for their Cordless Range - The 4Ah battery.
You can use this battery with any of Honda's cordless handheld or lawnmower products.
Made of high durability Li-Ion Cells it can provide over 1,000 recharge cycles and has a 24A maximum current draw.
Being Thermo-Smart means the battery system monitors every single cell's temperature and voltage. The unique battery housing design improves heat dissipation from the inside to the outside of the battery for longer lifetime and runtime.