Method of recharging a power source such as a rechargeable lithium ion battery for an implantable medical device. Energy is received within the implantable medical device from an external energy source which energy is used to recharge the power source. At least one recharge parameter associated with recharging of the power source is monitored. Recharging is regulated by increasing a charging rate of the power source in response, at least in part, on the recharge parameter being monitored.
