I have a Coleman Rechrgeable Quickpump 5999-400 and the charging instructions lack the time you should charge it for after having used it a number of times and will the indicator on the charging unit tell you it is at full charge? It stays at a constant green when plugging it in but the instructions lack a lot of information as to how long to charge it, other than the initial charge before using it. If it stays on green can it be over charged? I have charged it after every use but don't know when it is at full charge. The indicator light, as I have said, stays on green forever. Thanks for any info you can provide and just a suggestion on your instructions for use...please provide all the info needed to know when the unit is fully charged or give info on how long to charge after each use on a normal useage. Most other chargers will indicate when fully charged or offer optimum charge time after each use,. Thanks.