i think 11.1v li-ion charges at 12.6v? id have to look it up. i have no idea what leds you are gonne be powering with 12v though! what do you have planned? but essentially the recharge port diagram should work fine. i believe what most ppl do for hilts with no sound is replace the board connections here with your switch/led.

ps. im super happy this old thread got dug up so everyone can admire slothfurnaces amazing recharge port illustration. it belongs in a museum