Yes an actual Li-Ion charger, i have several from basic just working stuff to semi-pro and pro chargers.
Could all so hook it up to some random Nokia charger, but than i would have to monitor the battery or else it would go way beyond 4.2V and potential cause the battery to vent with or without fire or explode.

The best thing with my own custom "charge port" is that i can charge with 1C no matter how big the battery is, which means that when i get some good battery's with 1200mAh+ than i can charge the battery with 2.4A, this will mean that charge time would be max 1.5 hours.
Or could charge for 30min and have enough power to last a day with good usage.