Thanks, very helpful. Worked for me also, using the higher capacity Panasonic cells. I was a little bit worried whether the two batteries connected in parallel need to be closely matched to charge properly. I will keep an eye on the Cycliq when it’s charging the first few times to make sure it doesn’t overcharge or overheat.

One more tip, be careful when pushing the PCB out from the rear slot. The plastic in this area is very thin and easily damaged if you don’t take care to choose a suitably thin tool for pushing.

I had one unwanted problem: the red wire to the front light unit snapped off at the PCB and I had to resolder it. Luckily it is just long enough to do this without replacing the wire. This wire’s plastic insulation had hardened : I suspect due to heat generated by the LED.

The battery can be removed with the help of an old credit or loyalty card cut down in width. Once you have managed to lift the connector end of the battery, use the plastic card to push down and side to side so as to separate the battery from the sticky tapes holding it in place.