I have been matching these Eastpower batteries for quite a long time and have found them to be very close to the performance of the IB4200 cells with marginally less voltage but a lower internal resistance. Their performance on track is indistinguishable from the IB cells.
The company is small and I have visited the factory
(a very good story). With the purchases from Orion, I would assume that this company will grow very quickly.
Some points to note about these cells:
* Do not zero them (like IB cells)
* You should always keep some charge in these cells otherwise they will 'self discharge' which effects runtime
* The latest version (black positive washer) has IR figures from 1.4-1.6, lower than the IB4200SHV cells that I have been matching.
Once the self discharge question is understood, then you have absolutely no problems with these cells. As you can see from the comments from Australian racers who use my matched Eastpower cdells, the cells have proved very good. As for who is behind the Eastpower cell, the manufacturer is very quiet in this regard... however I neither know or care as long as I can get competitive cells. It is good to see another competitive company come along to compete with IB (which are very good cells as well) as it seems that GP is slowly heading the way of Sanyo.
My comments are also not based on my alliance to any battery company. I match all three brands of cells so I have no agenda to push unlike some other matchers