Sorry, we don't do the NIMH batteries any more. However if you choose to upgrade to a Li-Ion battery you will get a smaller more powerful battery that will burn your lights brighter and last longer.
Li-Ion batteries weren't around when we started selling the NiMH batteries so unfortunately a NiMH charger wont work with a Li-Ion battery.
For comparison the NiMH 4.0 Amp/H 12 volt batteries had a capacity of 48 Watt/ Hours if they were the earliest 1997-1999 batteries, they weighed approx 650g. From 2000 onwards the NiMH batteries ran at 13.2 volts and so their capacity increased to 52 watt/ Hours, they weighed approx 700g.
The Enduro 2.6 Amp/H , 14.8 v Li-Ion battery has a capacity of 38 Watt/ Hours and weighs 260g. The Extender 5.2 Amp/Hour 14.8 v Li- Ion battery has a capacity of 76 Watt/ Hours and weighs approx 500g.
High Capacity 3.1 Amp Hour Ultra-lightweight 14.8v Lithium Ion (Li-Ion) Bag Battery. This small, but powerful 3.1 Amp/Hour battery comes with a single DC output connector in an outer case. The battery is contained in a small bag with a strong strap that lets you fix it under the handlebar stem. So small you forget it's there.Learn More£80.00
High Capacity 6.2 Amp Hour Ultra-lightweight 14.8v Lithium Ion (Li-Ion) battery. The 6.2 Amp Hour Extender Bag Battery is designed to fit under a frame cross tube. It comes with two leads 600mm each. Excess cable can be coiled into the bag.Learn More£120.00