Hi see there are Li Iron Phosphate (lifepo4) 36volt 10amp batteries on EBay for around 250 pounds with charger plus delivery,
eBay UK Shop - PingBattery: 36V LiFePO4 Batteries, 48V 24V Battery, Electric Bike Scooter that’s in the same price bracket as NiMh and li-ion manganese
. lithium iron phosphate (LiFePO4) batteries, or nano lithium-ion batteries as they are sometimes called, are the newest generation of rechargeable batteries on the market.
There are three types of lithium ion cells based on different cathode materials. They are lithium cobalt oxide, lithium manganese oxide and lithium iron phosphate types. Although lithium cobalt oxide cell has the advantage of high energy density, it suffers from safety concerns. Lithium manganese oxide cell has been evaluated for the application on high rate due to the better safety characteristics. However, its high temperature performance is the major drawback and experience from a lot of members on this forum a short life cycle. While Lithium iron phosphate cell has the best safety characteristics, long cycle life (up to 2000 cycles). It is very suitable for high discharge rate occasions such as EV.