The new battery will go into a protective mode when first used and needs an extended charging period to activate. Charging it will not result in failure.
Please confirm whether your original battery part number or machine model is correct before purchasing. If you are not sure, you can contact customer service to confirm
Excellently Compatible : Only compatible with S-tihl HSA 25, HSA 25 Cordless Shrub, HSA 25 Grass Shears,please find more details in the images