Quite good. It does the job. It is reasonably priced. I had the same lights appear though regardless of how long I let the battery charge. I imagined there would be some change to indicate a complete charge. I am not sure if that is a battery or charger issue. This would be a great buy for anybody using FX pedals outdoors on a regular basis. I got it for my fishman pickup battery which wears down when you mistakenly leave the tuner turned on.