I thought I'd share my experience of this unit that I bought just before Christmas! I was going to send it back for a refund but decided to buy a replacement battery (a 22Ah Lucas) instead, at least then I'll know it's up to the job! Yes the review goes on for a bit, but if you're thinking of buying ANY jump starter, or already have one, you owe it to yourself to watch this - all is not what it seems...