From Petzl website:
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.
You can use AA/LR6 Lithium batteries with the following lamps
MYO range: MYOBELT SB5 / MYO / MYOLITE.
DUO range: DUO LED 14.
Others: SAXO / MICRO / ZOOM Halogène.
Discontinued headlamps: MYO 5, DUO LED 8.
Attention: the use of Lithium batteries reduces the lifespan of incandescent bulbs.
Do not use Lithium batteries with the following lamps
TIKKA / ZIPKA range: TIKKINA / TIKKA / ZIPKA / TACTIKKA / TIKKA PLUS / ZIPKA PLUS / TACTIKKA PLUS / TIKKA XP / TACTIKKA XP / TIKKA XP ATEX / TIKKA XP HAZLOC.
MYO range: MYOLITE 3 / MYO 3 noir / MYO XP.
DUO range: DUO LED 5.
SAXO AQUA.
Discontinued headlamps: MYOBELT 3, DUO LED 3.
It depends on which lights
as noted in your text. Many LED lights are designed to function well with lithium, alkaline or NiCd rechargeables.
A lot depends on the circuitry of the LED driver.
Go to candlepowerforums.com for more information on the use of lithium batteries in LED lights.
Apex from Princeton Tech is designed…
…for alkaline AA or lithium AA use. It’s center 3 watt LED is brighter than the Petzl Duo halogen and the headlamp is also IPX7 submersible (including battery pack).
http://www.princetontec.com/
There’ll probably be more gadgets coming on the market designed for use with lithium AA’s, but I’ve called manufacturers to make sure lithiums are OK to use with various electronic devices if it’s not stated explicitly in the manual.
thanks for that RM
Apex
It works better than the $150 bike LED head light I bought. They oughta put in a 5watt LED and have a three position output.