Buying a second battery????

[Dave_the_B]

All that I know is that I know nothing, I am after some basic advice please.
I wish to buy another battery to compliment the one that came with my wifes 8fun ebike, I have been quoted £270 for one the same as supplied with the bike but, through this forum, I have been looking at the BMS battery site and found similar spec for a third of the price...Can you give me some advice please:
This is my controller and these are the two batteries I can afford
http://www.bmsbattery.com/36v/522-bottle-ebike-battery.html
http://www.bmsbattery.com/36v/162-36v-10ah-lithium-ion-alloy-shell-ebike-battery-pack.html
Which one is most suitable?
Thank you for looking
Dave

 

[pdarnett]

The second battery (http://www.bmsbattery.com/36v/162-36v-10ah-lithium-ion-alloy-shell-ebike-battery-pack.html) would be better as it has a higher discharge current of 15A so would happily supply the 13A max your controller could demand. The bottle battery can only do 10A max current. Hope that helps.

 

[Deleted member 4366]

Why do you need a second battery? There may be better options.

 

[Dave_the_B]

Thank you for the replies.
What are the better option please?