The ad is slightly misleading though, and I have to confess to being partially responsible.
The seller, although a nice guy and successful businessman in other areas, does not really understand the market - e.g.
DUE TO THE SLIMLINE 36V/16AH PRO 4 PING BATTERY. (water bottle in picture not included)
It is neither a Ping, nor from the weight do I believe it to be lifepo4. It's not heavy enough.
I think it is in fact a Lithium Polymer. When I bought my bike, I examined the battery, and saw a Ping reference, but on closer inspection, and with the benefit of reading glasses, the Ping reference was, and I quote
"the quality insurance for this product is provided by PING AN INSURANCE COMPANY OF CHINA"
Unfortunately, I gave the vendor the impression that this was a potential selling point. He didn't similarly pick up on the fact that I also advised him that there was no such thing as a Life PRO battery - or if he did , he liked the ring for marketing purposes.
It doesn't however distract from the fact that these are good bikes at a good price, if you can live with the e-bay business model.
I've had mine 6 months, done over 1000 miles, with no real issues.
I would repeat that with support, a bike of this spec will cost around £1250 - £1600 depending on the supplier.
The battery is not bad, the build quality quite good, the UK supplier lacks resource to fix anything, although he seems honest.
"You pays your money, and you takes your choice"
Nick