R Ray Johnson Finding my (electric) wheels Feb 16, 2016 11 1 84 Mar 25, 2019 #1 The battery on my Oxygen CB is getting tired. Any ideas on the most effective way to go? Grit my teeth and buy a new one? If so, where? Have the old one re-celled(?) if so where? It is - I think - a 36v 13.5 ah seat tube battery.