Is the bolt a mech and does have a safety circuit?
If you girlfriend is using a mech she really needs to get a multimeter to check the batteries every time she takes them off to recharge and after they are charged. Lithium battery should never go below 2.5 volts. There are serious safety issues with mechs and lithium batteries you need to know what you are doing.
In fact everyone who charges lithium battery's needs to have one to check the condition of the battery and charger.
If you girlfriend is using a mech she really needs to get a multimeter to check the batteries every time she takes them off to recharge and after they are charged. Lithium battery should never go below 2.5 volts. There are serious safety issues with mechs and lithium batteries you need to know what you are doing.
In fact everyone who charges lithium battery's needs to have one to check the condition of the battery and charger.