Having 4 battery chargers, NiCd36v,NiMh24v,NiMh36v,Li-pol37v and seeing the number of posts about defective chargers on the forum at the moment, I decided to look and see if there were any alternatives to the chargers supplied with the electric bikes, there are a couple that can handle upto 30-cell packs, all the battery types and are able to discharge as well as charge. Priced at 99.99.
Graupneto Ultramat 30 and the Schulze Chamaleon isl -330d
Skyline Models Limited Chargers / Balancers