They were all a few weeks outside the year warranty. Hopefully the replacements are at my office. The didn't arrive in time before I hit the road for Furthur.
Were yours still under warranty? I think I'm having a similar problem. I can use one until it gets to half-full, then it shuts down. When I connect the charger, it shows half-full, and it only takes about 30 - 45 min to charge. This battery is about 2 yr old or so.
The other one I have will only turn on if I connect it to the charger. This is about 2 yr old too.
It's a shame if I can't get them fixed. I was the biggest supporter of these batteries. I have 2 that seem to be working fine, but these other two have failed for some reason, and from talking to Chris it seems that they are out of warranty.
Exchanged e-mails with Chris today. The replacements are on the way.
I'm in the same boat - loved this battery, but had it fail on me twice powering a V2 during a concert. Purchased new 6/26/2010, had no problems for a year (used it 6/24/2011 - 6/26/2011 at a festival running ~5 hours each day with no problems). On 9/1/2011 it failed 3 hours into a set, recharged in about 30 minutes, so I thought perhaps I hadn't fully charged it, the next day it failed 2.5 hours into a set. This is the second battery from them that I've had in 2 years. I emailed Chris, stating the purchase date and that this is my second battery with such issues. If this isn't covered under "goodwill" warranty, I most certainly will not be purchasing a new one.
I used to think it was well worth the $110 price tag, but after 2 failing just over the 12 month warranty, I would not recommend buying this if you expect it to be your primary power source. Currently on the hunt for an alternative source for powering a 6v V2...
Ryan