Well I've been researching what ebike kit to buy and I've settled on the Phoenix II 7240 Power System Only.. http://www.electricrider.com/crystalyte ... xiikit.htm
. I called electricrider about an hour ago and they answered a bunch of questions for me and the only thing I need to figure out is if I want to go sensorless or sensored.
Anyway, I've also been hunting around for batteries and was looking at pingbattery ''48V 20AH V2.5 LiFePO4'' and also found the joyfay ''48V 20Ah LiFePO4 Battery Pack Free BMS+6A Charger NEW''. I had questions about both and shot off and e-mail to both companies last night.
For pingbatteries my question was about the upgraded BMS. I found out the current limit gets raised to 60A if you order the high current BMS. My e-mail got answered quickly..
For the joyfay pack I wanted to know the exact weight of the battery and BMS, not just the shipping weight as I noticed is listed on Codd Power http://lifepo4.in/48v40ah-.html
where I first saw the battery. I got a very quick response telling me the weight of both packs I asked about. ''the 48V is 26 lbs and the 60V is around 31 lbs. We have the 48V in stockin the US but the 60V one will have to be shipped from overseas.'' I then asked about the 3000W 120A BMS upgrade on the 48v pack and was informed that pack would have to be shipped from overseas - takes about 10 to 15 days. All these emails to joyfay were answerd in less than a couple hours.
Well, at least that part went well. At joyfay they show this -- ''Hassle-free Return PolicyLocated in Ohio, USA, we have warehouses in Ohio, California, USAand London, United Kingdom. For any reason you don't like your order, simply return it to any warehouses within 7 days after you receive your order. You just need to keep it in its original conditions. You will receive 100% money back once we receive your return.''
7 days isn't enough time to know if the battery voltage sags way down after the battery is broken in.. especially if you don't have the ebike put together yet. I'll have to email him and ask more about exchange policy, etc.
So I found this thread after doing a Google search trying to find out the quality of joyfay batteries, or just people's luck with them.
I'll search more threads.. but in the meantime, does anybody have any experience with joyfay or know of anyone who does? It seems like a good deal if the battery perfoms well.