MYO headlamps and AA/LR6 rechargeable batteries

lampes MYODue to advances in the performance characteristics of AA/LR6 rechargeable batteries (especially their higher output during discharge), they can in certain cases of intensive use, cause quality and safety problems with MYO-series headlamps. When the headlamp is used with AA/LR6 rechargeable batteries, if a short-circuit appears in the cable connecting the battery case to the lamp, the cable can spark, melt, or catch fire. This poses a burn hazard to the user.

Lithium batteries information

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.