how long could i expect the battery to last before need ing replacement . how would i know that the battery is in fact unchargeable and reason unit fails to start

Bought this leaf blower for $80 from eBay (had a special promo on, normally $99). Great little product, very light and surprisingly powerful and much quieter than petrol blowers plus no nasty fumes etc.. Has 2 speed settings which is handy - the slower setting allows you to create piles of debris without blowing stuff all over the place.

Previously I had a Makita 2 stroke leaf blower - this was a great unit but very noisy and much more power than I needed for my garden. Note that the Baumr product is not as powerful as the petrol blowers but more than sufficient for use around a normal garden.