Just started up with the epen products, here's my problem , I bought an aspire 1600, was having problems with the charger, meaning when charging the red light always stays on, but it is charging somewhat, took it back, they changed out the charger twice, same problem, then they changed out the battery to a kangor evod 1600, took it home, used the charger, green light came on, like its suppose to, then after a few days the red light always stays on after leaving over 4 hours to charge, clean everything. I'm in my car all day for work and use this thing all day long but this product does not last all day for me. Any help would be appreciated. Thanks Larry