I agree with Russell. When I won my "Chan-pack" on eBay, it was just before I started reading this forum, so I did not know what I was getting into. Anyways, I won my auction for a very very good price, and paid right away with Paypal. Then about 10 hours later, I see that they have had their account closed by eBay. I wrote all this in another thread, but I think it bears repeating here. Anyways, I freaked right away, and started to put in a dispute with PP. In the midst of doing that, I read a post that Chan made on PP saying that even though he was cancelled from eBay, he would still do the right and honorable thing.
I emailed him, and thus started my many dialogs with Emma, who basically told me to chill, and the battery would be here soon. True to her word, it came via AirMail in only 5 days. I have been extremely pleased with the pack since I have had it.
And remember, they sent it even after their account had been cancelled.
All that to say this: There will always be a certain amount of risk when purchasing online, no matter who with. In the case of Chan/Emma, I would say the risk is a bit higher than average, but the amount to be saved is much higher than the risk. This battery pack is lighter, better constructed (imho) than Vpower (my first purchase in LifePo4 packs), and truer to the stated capacity ratings. Even before I read this forum and found out about Pings' great reputation, I did price comparisons, and his pack was priced at $280 more than the pack I got. For me, the risk was worth it.
Just one Average Guy's opinion........