good product but not so powerful as I want it

Product arrived on time & in good order. Product works as advertised and seems fair value for the price, though it will need careful handling. Basically a consumable device that will have a useful lifespan of that of the battery if so handled.  Doubtful if replacement batteries would be a viable option, (except under warranty). At end of supplied battery life one should expect to repalce the whole unit, but again, for the price, if nothing else goes wrong with it, fair value.