warning: Lithium batteries prone to explosion.wear safety gears.dont use puffed and expired battery. don't allow the terminals to touch/short circuit.I am not responsible for any explosion and damages to your property.Do this instructable at your risk.
Step 1: Things Needed
headers (male or female)
Step 2: Modify the Battery
Step 3: Remove Outer Layer
Step 4: Open the Top of Battery
Directly connect the wires to the terminals.
Then repack the battery.
you can also remove the top(limiting circuit) of the battery if it not needed.
Step 5: Connect the Wires With Headers.
Step 6: Charging
As there is no indication for full charge calculate the timing to charge.