Fenix Support logo
Fenix Support logo

All articles

Fenix E03R FAQs

Everything you need to know about the Fenix E03R keychain flashlight

Do you have any Fenix flashlights that run on 10440 batteries?

No, we do not have any flashlights that run on 10440 batteries. If you're interested in keychain flashlights, we recommend you look at the Fenix E03R and E02R rechargeable keychain lights and the Fenix E01 V2 keychain flashlight.

What batteries work in the Fenix E03R keychain flashlight?

The E03R has a built-in lithium-polymer battery that cannot be removed. You can charge this battery using the USB-C charge port.

Was the Fenix E06R prototype released?

Yes, but Fenix changed the name to the E03R. Make sure to check out the Fenix E03R!

Does the E03r feature overheat protection?

Yes, the light can accumulate heat when used on the High output levels for extended periods. The light may step down by a few lumens to reduce the temperature, but the High output may be reselected if necessary.