I'm about to buy batteries for a 36V 20A brushless geared system (http://www.ebike.biz/bmc.htm) and I'm interested in recommendations for what size / type of batteries to get. The ride I have is 2 x 19km commute (i.e. 38km total in the day). I plan to put reasonably substantial pedal effort in along the way on the flat & use batteries to keep up speed up the hills. I have several hills, but they aren't mountains. The options I'm pondering are:
(a) Battery Type - Lead Acid or "36V 10Ah LiFePO4 Ebike Battery" (latter from http://evpower.com.au/-Lithium-Ion-L...atteries-.html for AUS$399)?
(b) Capacity of battery - mainly a question for the sealed Lead Acid option (as the LiFePO4's are 10AH)? Basically I'm interested in going for the 10Ah LiFePO4's for weight, however if the 10AH isn't going to be enough then I'd consider the SLAs.
(c) Plan to Charge at Work or Not?
Question 1 - What sort of AmpHours (AH) do you think I'd be looking at for a round trip ride? I guess this will indicate whether the 10Ah LiFePO4 option would require a charge at work or not? What setup would you recommend?
Question 2 - If I plan to charge at work (not sure how much the 2nd charger would be though), what setup would you recommend?