I bought a PING lifepo4 battery which lasted and performed very well in spite of my careless ignorance. I only wish I had known then what I know now and I would have probably gotten much more from my pack.

Things I did wrong: charging the pack 100% after each ride; charging in freezing weather; 5A charging.

My pack was being discontinued when I checked with Ping for replacement. I had a new pack assembled locally by Chans battery (London Ontario). It is a Li ion pack. It performs perfectly well and I expect to keep it a long time thanks to my Luna Cycle charger. I charge at either 1A or 2A and limit my charge to 80%. The pack is fully charged every 2-3 months so as to allow the cells to balance. I never feel the need to charge at the full 5A

The Ping battery was excellent and gave me more than I deserved.