It is a 2012 2Five. Cord plugs in under the drivers seat. Charger is built in. Normally when charging it is a flashing green light beside the plug. The owners guide says when it flashes amber it is reduced output. The batteries were at half charge when I first plugged it in and it flashed green as normal. Then after a few hours it started flashing amber. Does that mean I have a bad battery or what? Thanks for your help.