I have several questions:

1) Are the stock batteries used one at a time or both at the same time?

2) The walmart ad states that the bike will go 15 miles, is this on one or both batteries?


3) When charging the batteries, are both batteries being charged at once or do you need to charge one battery for 8 hours and then the other one as well?


4) Now, most important question...where can I buy the lifepo4 36v 10ah battery?


I checked ebay and this is all I found (the battery looks much different from the ones posted in this thread).

36V 10AH LIFEPO4 BATTERY electric bicycle BIKE scooter - eBay (item 130274124025 end time Feb-04-09 09:20:53 PST)