New- ENERGIZER 84031 STARTERUP 400/200-WATT INVERTER COMBO PACK - 84031
I'm not sure if this was sent to be damaged or just a bad battery concept but immediately after receiving this unit I followed the directions and plugged it in to charge. After letting it charge all night I woke up to find it was making a very loud humming noise and was so hot I thought it was going to explode so I quickly unplugged it and ran it outside away from my house. I had high hopes for this battery so hopefully I got a bad one and anyone else buying it might have a better experience.