quick question

[skinful]

My 400ex had been sitting for a month or so with a brand new battery, went riding no problems, two days later my buddy took it down the street and back almost to the driveway he tried a wheelie stalled it and it wouldnt start battery DEAD. So I hook it up to trickle charge over night test battery and its got 12.57 volts but when I try to start it it turns slow (like dead battery) and wont start recheck volts and theyve dropped to 6.5-7v...put it on charger and they charge back to 12.57v?????
Could this battery be bad and just not getting enough cranking amps? What else "could" it be?
Thanks

[honda400ex2003]

very possible, since you bought it recently, get your receipt and take it back to where you got it and at least have it tested for a bad cell. I would suspect that is what it is imo. a cell tester will determine this and is mostly the case when batteries dont hold cranking amps. if it does have a bad one tell them they can keep it and you want a new one to replace it. steve

[honda400ex2003]

edit: that was my first triple post from one click in a long time lol steve

[finsteratv]

my 400 had the same problem got a new battery and it was fine

[slightlybent47]

Even new ones go bad sometimes, try a new battery.

[CJM]

Probably has a bad cell in the battery, try a new one.