Limitations on use of AA/LR6 and AAA/LR03 Lithium batteries with headlamps.
This information does not apply to the e+Lite which was designed to work with CR2032 Lithium batteries.
Lithium batteries are lighter and give longer burn times at low temperature than traditional Alkaline batteries.
Due to recent advances in the performance characteristics of Lithium batteries (especially their higher output during discharge), they can cause the lamp to overheat and possibly damage the LEDs.