The batteries can only hold 3.2 volt at low currents (maybe 5A) and you cannot even drive a XM-L at full power with 3.2 volt (Maybe if you can select between a couple of XM-L, you can find one with low enough Vf).
This battery can easily drive 10 XM-L leds at full power, but then they need a Vf of 3 volt and a very good connection from the battery to the leds.
Not very surprising, any battery can deliver more than their rated current when shorted.