E3A high cri with alcaline.
In comparision with Fenix E05 2014. Which has 25 lm stabilized and then 1 lm near 4h 15m. E05 has not warm tint, is 5 mm longer, has several modes (what for twisty format I do not prefer).
The module is easy to be removed (for later moding) by thin pincette twisting: no glue or soldering. It’s also easy to try different lenses.
To change SMD 0603 resistor costed 50% flashlight’s price in electronic repair service. Resistors in electronic shops have low cost.
For edc is enough light on 5 m to see a road near during walking, for what ~25 lm fits.
Producer claims 75 lm.
After replacing the resistor R1 0.43 → 1.5 Ohm the calculated result is 0.43 / 1.5 * 75 = 21 lm.
Stabilized runtime on alcaline Energizer AAA is ~3h 30m. Plus ~30 min with slow lowering to probably ~5 lm. Somewhere on another 30 min the light becomes too low. The battery may go < 0.8 v.
Light power is evaluated as seen by eyes. Runtimes were calculated in 20-25 C temperature. The conditions of 10 C and below may give the difference of tens %.
An alcaline battery can do many self-recharging cycles where it restores to lesser voltage.
For that Energizer and resistor mod. If after 5 min of alcaline battery was discharged and rested to switch the light again, it may give usable light (for keychain tasks) during some minutes. Since 2 hours of been switched off, the usable light is up to 30 min. Longer self-recharging adds a little, where full may take 24 hours. After ~5th self-recharge the voltage is < 1 V , when the light is useful up to 1 m (or more without details) during some minutes. Since < 1 V self-recharges reduce initial voltage slower, alike -0,01 V.
So, in case of hard battery supply problems you may still use discharged alcalines for keychain tasks, for lesser time and mb with lesser light.
To reduce the risk of battery leakage it may be useful to use alcaline batteries which have 10 years of promised store time. Hypothetically, more discharged alcaline battery have higher risk of a leakage.
Resume:
E3A with 1.5 Ohm modification gives light power and runtime close to Fenix E05 2014 (in middle mode). With adding the advantages described above.
If to set 3 Ohm on R1 this will give ~10 lm, what original Fenix E01 had. Stabilized runtime on alcaline will be ~8h 20m plus ~30 min of usable light. 10 lm is not bad for 2m distance and normal roads (or for slow moving), what may fit main tasks for a keychain/edc light.