Mintyboost is already cool but it would be even cooler if there was a built-in circuitry to charge the NIMH batteries after they get depleted. Then it would be a complete all-in-solution as I often forget to carry a separate NiMH charger with me.
As I understand there are two ways of charging NiMH. One is the dumb way by fixing the charge current at 0.1C and then setting a timer but its slow and also not recommended. Another way is the negative delta V termination method which I have already seen in my Turnigy Accucel-6. It's unreliable on its own for anything less than 3 cells but coupled with a thermal sensor it works perfectly.
Obviously the Turnigy being a multi-purpose charger is a bit too big to lug around in one's pocket. Do you think its possible to incorporate the same charging mechanism within mintyboost?