Be careful ...I ordered from the Neu site 2 weeks ago...they refunded the price of the batteries I ordered but still charged full price for shipping the other items (charger adapter and connectors). I have not been able to get Neu/castle to return my calls...and you can still order the same batteries on their web site today...

http://www.neumotors.com/store/page12/page12.html

See the NEU5000XP 2S1P for $29

I have always liked Castle but I left messages and they are not returning my calls...