I have a Deep Cycle Battery. I used it to test my 36v 500watt motor on my push trailer. The trouble is this battery 12V 93AH is a very heavy (66LB).
If you planned to used a deep cycle batt the problem arises when it runs out? You have all that weight to now tow around on your bike
Regards
Tom
the weight, the sheer size, the cost always made them unusable in my mind. That is just my opinion. If you use two or three of those where are you going to put them on the bike?